Energy-saving circuit of LED lamp power supply system

Abstract

The utility model provides an LED lamp power supply system energy saving circuit comprising an AC-DC reverse power supply, a control system module, a 245 signal amplification circuit, a row MOS tube driving module, a green and blue general constant current driving IC, a red general constant current driving IC and a common anode LED lamp matrix. The AC-DC reverse power supply is electrically connected with the control system module, the 245 signal amplification circuit, the row MOS tube driving module, the green and blue universal constant current driving IC and the red universal constant current driving IC, the 245 signal amplification circuit is connected with the red universal constant current driving IC through the isolation chip, and the red universal constant current driving IC is connected with the common anode LED lamp matrix; by adopting the design of the reverse energy-saving circuit, the device and the constant-current driving IC only need to bear the voltage difference between the two ends of the LED instead of the voltage of the whole power supply, so that the general low-cost device in the market can be selected, and the cost of the whole device is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of LED lamp power supply circuit technology, and in particular to an energy-saving circuit for an LED lamp power supply system. Background Technology

[0002] LED lights are widely used in lighting and display fields due to their high efficiency, long lifespan, and environmental friendliness. However, in existing LED driving technologies, especially for large-scale LED matrix driving and lighting applications, traditional circuit designs still have some limitations and shortcomings, particularly in terms of power consumption, cost, and circuit efficiency.

[0003] Traditional circuit designs typically use common-cathode circuits, where the positive terminal of the LED is directly connected to the positive terminal of the power supply (e.g., +3.2V or +4.2V). The switching devices or constant-current driver ICs need to withstand the entire power supply voltage, thus requiring the selection of high-voltage models. For example, common-cathode designs require driver ICs to withstand high voltages (e.g., +4.2V), necessitating the customization or selection of higher-voltage models, which increases the chip manufacturing cost and significantly raises the overall cost of the device. Therefore, this invention proposes an energy-saving circuit for LED lamp power supply systems to address the problems existing in the prior art. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to propose an energy-saving circuit for an LED lamp power supply system. This energy-saving circuit for an LED lamp power supply system has the advantage of reducing costs and can solve the problems in the prior art.

[0005] To achieve the purpose of this utility model, the present utility model is implemented through the following technical solution: an energy-saving circuit for an LED lamp power supply system, including an AC-DC reverse power supply, a control system module, a 245 signal amplification circuit, a horizontal MOSFET driver module, a green and blue universal constant current driver IC, a red universal constant current driver IC, and a common anode LED lamp matrix. The AC-DC reverse power supply is electrically connected to the control system module, the 245 signal amplification circuit, the horizontal MOSFET driver module, the green and blue universal constant current driver IC, and the red universal constant current driver IC. The 245 signal amplification circuit is connected to the red universal constant current driver IC through an isolation chip, and the red universal constant current driver IC is connected to the common anode LED lamp matrix. The output terminal of the 245 signal amplification circuit is connected to the green and blue universal constant current driver IC, and the green and blue universal constant current driver IC is connected to the common anode LED lamp matrix. The 245 signal amplification circuit is connected to the common anode LED lamp matrix through the horizontal MOSFET driver module.

[0006] A further improvement is that the control system module sends out control signals, which include horizontal signals and data signals. The horizontal signals are amplified by a 245 signal amplifier circuit and then enter the horizontal MOS transistor driver module. The data signals are amplified by a 245 signal amplifier circuit and then enter the green-blue universal constant current driver IC and the red universal constant current driver IC, respectively.

[0007] A further improvement is that the isolation chip is one of a diode device, a transistor device, or a dual-diode device.

[0008] A further improvement is that the AC-DC reverse power supply has two voltage outputs: a first voltage output and a second voltage output. The first voltage output range is -2.8 to -3.5V, and the second voltage output range is -3.8 to -4.2V.

[0009] A further improvement is that the first voltage is connected to the Hongtong Universal Constant Current Driver IC, and the second voltage is connected to components other than the Hongtong Universal Constant Current Driver IC.

[0010] The beneficial effects of this utility model are as follows: The energy-saving circuit of this LED lamp power supply system adopts a reverse energy-saving circuit design. The components and constant current driver IC only need to withstand the voltage difference across the LED, rather than the entire power supply voltage. This allows for the selection of commercially available, low-cost components—LED lamps and driver ICs—significantly reducing overall component costs. It can replace the energy-saving effects of the original high-cost and existing patented common cathode solutions. This creates better energy savings for the company, improves overall system stability, and enhances display quality and efficiency. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the existing common cathode circuit structure for LED lamp power supply.

[0013] Figure 2 This is a schematic diagram of the reverse energy-saving circuit structure proposed in this utility model.

[0014] The components include: 1. AC-DC reverse power supply; 2. Control system module; 3. 245 signal amplifier circuit; 4. Horizontal MOSFET driver module; 5. Green and blue universal constant current driver IC; 6. Red universal constant current driver IC; 7. Isolation chip; 8. Common anode LED matrix. Detailed Implementation

[0015] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0016] according to Figure 1 The diagram illustrates the existing common cathode circuit structure for LED lamp power supply. This embodiment proposes an energy-saving circuit for an LED lamp power supply system, which employs a reverse energy-saving circuit (anode-supply design). Compared to common cathode circuits, which are generally mature and have corresponding patented products on the market, the price of such products is much higher than that of general-purpose components. In this device, by using a common anode circuit, corresponding general-purpose components can be used to reduce costs, thereby reducing the cost of components and the investment cost of equipment, bringing better economic benefits to the company.

[0017] Specifically, the system includes an AC-DC reverse power supply 1, a control system module 2 (corresponding to a control chip), a 245 signal amplification circuit 3, a horizontal MOSFET driver module 4 (corresponding to a horizontal MOSFET), a green / blue universal constant current driver IC 5, a red universal constant current driver IC 6, and a common anode LED matrix 8. The AC-DC reverse power supply 1 is electrically connected to the control system module 2, the 245 signal amplification circuit 3, the horizontal MOSFET driver module 4, the green / blue universal constant current driver IC 5, and the red universal constant current driver IC 6. The AC-DC reverse power supply 1 converts alternating current to direct current and has two voltage outputs: a first voltage output and a second voltage output. The first voltage output range is -2.8 to -3.5V, preferably -3.2V in this embodiment. The second voltage output range is -3.8 to -4.2V, preferably -4.2V in this embodiment. By reverse design, the system adapts to the forward voltage requirements of different LED colors, thus optimizing power distribution efficiency. The first voltage is connected to the red universal constant current driver IC6 to power the red universal constant current driver IC6 and meet its low forward conduction voltage requirement. The second voltage is connected to the components other than the red universal constant current driver IC6 to provide higher voltages to the green and blue LED constant current driver IC5, the horizontal MOSFET driver module 4, the 245 signal amplifier circuit 3, the control system module 2, etc., to meet their higher forward conduction voltage requirements. Their unified power supply simplifies the circuit design.

[0018] The 245 signal amplification circuit 3 is connected to the red universal constant current driver IC6 through the isolation chip 7, and the red universal constant current driver IC6 is connected to the common anode LED matrix 8. The output terminal of the 245 signal amplification circuit 3 is connected to the green and blue universal constant current driver IC5, and the green and blue universal constant current driver IC5 is connected to the common anode LED matrix 8. The 245 signal amplification circuit 3 is connected to the common anode LED matrix 8 through the horizontal MOSFET driver module 4. The isolation chip 7 is one of the following: diode device, transistor device, and dual diode device. In this embodiment, it is a diode device.

[0019] For diode devices, the unidirectional conduction characteristic of diodes is used to prevent signals or currents from being transmitted in unwanted directions, thereby achieving isolation;

[0020] For transistor devices, transistors (BJTs or MOSFETs) are used as switching devices, and the isolation and transmission of control signals are controlled by the base / gate drive signals;

[0021] For dual-diode devices, there are two diodes that can work independently or in combination. A common design is to use one diode for forward isolation and the other for reverse isolation to achieve more complex signal isolation or current control.

[0022] The isolation chip 7 acts as a voltage reducer. Since the signal is transmitted in a ripple form, the isolation chip 7 can use dual diodes (dual diode type devices) to achieve more efficient level conversion. The minimum lighting voltage for the red LED matrix 8 is 2.8V. After being stepped down by the isolation chip 7, the red LED can achieve a minimum of 2.8V using the constant current driver IC 6, while traditionally it uses 3.2V. Using a low voltage to light the red LED achieves energy saving. Similarly, the green and blue LEDs can achieve 3.8V, while the traditional method is 4.2V.

[0023] The control system module 2 sends out control signals, which include row signals and data signals. The row signals enter the row MOS transistor drive module 4 through the 245 signal amplifier circuit 3. Specifically, the row signals include DCLK (data clock signal), GLCK (global clock signal), and OE (output enable signal). DCLK is used in the LED matrix to control the loading of data signals in one row or column.

[0024] GLCK controls global operations within an LED matrix, such as synchronizing refreshes across different areas in a large matrix;

[0025] The OE signal controls the start and stop of the LED output. When the OE signal is valid, the LED is allowed to light up; when the OE signal is invalid, the LED output is turned off. It is usually used to adjust the brightness of the LED (achieved by controlling the OE signal through PWM).

[0026] The data signals enter the green and blue universal constant current driver IC5 and the red universal constant current driver IC6 respectively, and the data signals are directly used to drive the core information of the display content.

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

Claims

1. An energy-saving circuit for an LED lamp power supply system, comprising an AC-DC reverse power supply (1), a control system module (2), a 245 signal amplification circuit (3), a horizontal MOSFET driving module (4), a green / blue universal constant current driving IC (5), a red universal constant current driving IC (6), and a common anode LED lamp matrix (8), characterized in that: The AC-DC reverse power supply (1) is electrically connected to the control system module (2), the 245 signal amplifier circuit (3), the horizontal MOS transistor drive module (4), the green and blue universal constant current drive IC (5), and the red universal constant current drive IC (6). The 245 signal amplifier circuit (3) is connected to the red universal constant current drive IC (6) through the isolation chip (7), and the red universal constant current drive IC (6) is connected to the common anode LED matrix (8). The output terminal of the 245 signal amplifier circuit (3) is connected to the green and blue universal constant current drive IC (5), and the green and blue universal constant current drive IC (5) is connected to the common anode LED matrix (8). The 245 signal amplifier circuit (3) is connected to the common anode LED matrix (8) through the horizontal MOS transistor drive module (4).

2. The energy-saving circuit for an LED lamp power supply system according to claim 1, characterized in that: The control system module (2) sends out control signals, which include row signals and data signals. The row signals enter the row MOS transistor drive module (4) through the 245 signal amplifier circuit (3), and the data signals enter the green and blue universal constant current drive IC (5) and the red universal constant current drive IC (6) respectively.

3. The energy-saving circuit for an LED lamp power supply system according to claim 1, characterized in that: The isolation chip (7) is one of diode devices, transistor devices, or dual diode devices.

4. The energy-saving circuit for an LED lamp power supply system according to claim 1, characterized in that: The AC-DC reverse power supply (1) has two voltage outputs, namely a first voltage output and a second voltage output. The range of the first voltage output is -2.8 to -3.5V, and the range of the second voltage output is -3.8 to -4.2V.

5. The energy-saving circuit for an LED lamp power supply system according to claim 4, characterized in that: The first voltage is connected to the red universal constant current drive IC (6), and the second voltage is connected to components other than the red universal constant current drive IC (6).

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