Power supply device of MiniLED display equipment

Abstract

The utility model belongs to the technical field of power supply of Mini LED display equipment, and particularly discloses a power supply device of Mini LED display equipment, which is characterized by comprising a power adapter, a signal acquisition circuit and a partition backlight control module, the signal acquisition circuit and the partition backlight control module are arranged in the Mini LED display equipment, a feedback input end of the power adapter is connected with a feedback signal, and a feedback output end of the power adapter is connected with the partition backlight control module. The voltage output end is respectively connected with the voltage input end of the partition backlight control module and the input end of the signal acquisition circuit, and the signal output end of the signal acquisition circuit outputs a feedback signal. Therefore, the signal acquisition circuit can acquire and feed back the signal of the backlight LED to the power adapter, so that the voltage output of the power adapter is adjusted, a DC / DC constant current module does not need to be additionally arranged for the backlight LED, the overall cost of the power supply device is reduced, heat is reduced, the efficiency of the power supply system is improved, and the working stability of the Mini LED display equipment is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of power supply technology for MiniLED display devices, and specifically relates to a power supply device for MiniLED display devices. Background Technology

[0002] MiniLED technology achieves high-density backlight zone control by integrating smaller LED chips into the backlight module. Each zone consists of multiple MiniLEDs, which, combined with precise dynamic dimming technology, provide higher brightness, contrast, and color performance. MiniLED backlight power supply typically uses a constant current drive circuit to provide a stable current to each zone, ensuring brightness consistency.

[0003] Reference Figure 1 As shown, in existing technologies, MiniLED display devices provide constant voltage output through a power adapter. Since the backlight of MiniLEDs requires an adjustable voltage input, a DC / DC constant current module is typically added to provide power input to the MiniLED zone control module, thereby driving the backlight LEDs and fulfilling the function of MiniLED zone control. Simultaneously, the DC / DC constant voltage module provides operating power to the motherboard. However, driving the backlight LEDs requires a low-voltage, high-current drive input, making the added DC / DC constant current module expensive. Furthermore, it generates significant heat within the display device, affecting its operational stability. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing MiniLED backlight power supply technology, which requires the addition of a DC / DC constant current module, resulting in high cost and large heat generation, and thus provides a power supply device for MiniLED display devices.

[0005] A power supply device for a MiniLED display device, characterized in that it includes a power adapter and a signal acquisition circuit, a zone backlight control module, and a DC voltage conversion module disposed within the MiniLED display device;

[0006] The power adapter's power input terminal is connected to an AC power source, its feedback input terminal is connected to a feedback signal, and its voltage output terminal is connected to the voltage input terminals of the partition backlight control module and the DC voltage conversion module, respectively.

[0007] The input terminal of the signal acquisition circuit is the backlight LED of the MiniLED display device, and the signal output terminal of the signal acquisition circuit outputs a feedback signal.

[0008] The voltage output terminal of the partition backlight control module is connected to the voltage input terminal of the backlight LED of the MiniLED display device; the DC voltage conversion module is a DC / DC constant voltage module, and the voltage output terminal of the DC voltage conversion module is connected to the power supply input terminal of the mainboard of the MiniLED display device.

[0009] Furthermore, the power adapter is connected to the MiniLED display device via a three-core cable, which contains a power line, a ground line, and a feedback line.

[0010] Furthermore, the signal acquisition circuit is an LED driving voltage amplitude signal acquisition circuit.

[0011] Furthermore, the signal acquisition circuit is an LED drive current signal acquisition circuit.

[0012] Furthermore, the signal acquisition circuit includes a photoelectric sensor, which is used to acquire the light intensity of the backlight LED of the MiniLED display device and generate a feedback signal.

[0013] Furthermore, the feedback signal output by the signal acquisition circuit is either a PWM signal or an analog level signal.

[0014] Furthermore, the power adapter is one of a switching AC / DC power supply, a linear AC / DC power supply, and a programmable AC / DC power supply.

[0015] Furthermore, the power adapter includes an input rectification and filtering unit, a high-frequency conversion unit, an output rectification and regulation unit, and a feedback control unit; the input terminal of the input rectification and filtering unit is connected to an AC power supply, the output terminal of the input rectification and filtering unit is connected to the input terminal of the high-frequency conversion unit, the output terminal of the high-frequency conversion unit is connected to the input terminal of the output rectification and regulation unit, the output terminal of the output rectification and regulation unit serves as the voltage output terminal of the power adapter, the input terminal of the feedback control unit serves as the feedback input terminal of the power adapter, and the output terminal of the feedback control unit is connected to the feedback terminal of the output rectification and regulation unit.

[0016] Beneficial Effects: This utility model discloses a power supply device for a MiniLED display device, characterized by comprising a power adapter and a signal acquisition circuit and a zone backlight control module disposed within the MiniLED display device. The feedback input terminal of the power adapter is connected to a feedback signal, and its voltage output terminal is connected to the voltage input terminal of the zone backlight control module. The input terminal of the signal acquisition circuit is the backlight LED of the MiniLED display device, and its signal output terminal outputs a feedback signal. The voltage output terminal of the zone backlight control module is connected to the voltage input terminal of the backlight LED of the MiniLED display device. Thus, the signal acquisition circuit can collect and feed back the signal from the backlight LED to the power adapter, thereby adjusting the voltage output of the power adapter. This eliminates the need for an additional DC / DC constant current module for the backlight LED, thereby reducing the overall cost of the power supply device, reducing heat generation, improving the efficiency of the power supply system, and effectively enhancing the operational stability of the MiniLED display device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic block diagram of the structure of MiniLED power supply technology in the prior art;

[0019] Figure 2 This is a schematic block diagram of the power supply device for the MiniLED display equipment of this utility model. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this application, it should be understood that "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Reference Figure 2 As shown, this embodiment provides a power supply device for a MiniLED display device, characterized in that it includes a power adapter and a signal acquisition circuit, a zone backlight control module, and a DC-DC voltage conversion module disposed within the MiniLED display device; the power input terminal of the power adapter is connected to an AC power source, the feedback input terminal is connected to a feedback signal, and the voltage output terminal is respectively connected to the voltage input terminals of the zone backlight control module and the DC-DC voltage conversion module; the input terminal of the signal acquisition circuit is the backlight LED of the MiniLED display device, and the signal output terminal of the signal acquisition circuit outputs a feedback signal; the voltage output terminal of the zone backlight control module is connected to the voltage input terminal of the backlight LED of the MiniLED display device; the DC-DC voltage conversion module is a DC / DC constant voltage module, and the voltage output terminal of the DC-DC voltage conversion module is connected to the power supply input terminal of the mainboard of the MiniLED display device.

[0024] The power supply device for MiniLED display devices provided by this utility model has a signal acquisition circuit that can collect and feed back the signal of the backlight LED to the power adapter, thereby adjusting the voltage output of the power adapter. There is no need to add an additional DC / DC constant current module for the backlight LED, which reduces the overall cost of the power supply device, reduces heat generation, improves the efficiency of the power supply system, and effectively enhances the working stability of the MiniLED display device.

[0025] In this embodiment, the motherboard connects to components including a control chip, an LCD screen, and a power amplifier, and provides power to these components.

[0026] Specifically, the power adapter is connected to the MiniLED display device via a three-core cable, which contains a power line, a ground line, and a feedback line.

[0027] In some embodiments of this example, the signal acquisition circuit is an LED driving voltage amplitude signal acquisition circuit. It can acquire the voltage output from the zone backlight control module to the driving voltage of the backlight LEDs and form a feedback signal. In these embodiments, the feedback signal output by the signal acquisition circuit is an analog level signal; the higher the driving voltage, the stronger the analog level signal. Preferably, in this embodiment, when the driving voltage is higher, the feedback signal causes the output voltage of the power adapter to be lower; conversely, when the driving voltage is lower, the feedback signal causes the output voltage of the power adapter to be higher.

[0028] In this embodiment, the output voltage range of the power adapter is 17V~20V, and the DC voltage conversion module can generate a constant voltage output within the above-mentioned varying voltage range to provide stable power to the motherboard.

[0029] In other embodiments of this example, the signal acquisition circuit is an LED drive current signal acquisition circuit. In these embodiments, when the drive current is higher, the feedback signal causes the output voltage of the power adapter to be lower; conversely, when the drive current is lower, the feedback signal causes the output voltage of the power adapter to be higher.

[0030] In other embodiments of this example, the signal acquisition circuit includes a photoelectric sensor. The signal acquisition circuit is used to acquire the light intensity of the backlight LED of the MiniLED display device and generate a feedback signal. In these embodiments, when the light intensity of the backlight LED is higher, the feedback signal causes the output voltage of the power adapter to be lower; conversely, when the light intensity of the backlight LED is lower, the feedback signal causes the output voltage of the power adapter to be higher.

[0031] In some other embodiments of this example, the feedback signal output by the signal acquisition circuit is a PWM signal.

[0032] The power adapter is one of a switching AC / DC power supply, a linear AC / DC power supply, and a programmable AC / DC power supply. In this embodiment, a switching AC / DC power supply is preferred.

[0033] Specifically, the power adapter includes an input rectification and filtering unit, a high-frequency conversion unit, an output rectification and regulation unit, and a feedback control unit. The input terminal of the input rectification and filtering unit is connected to an AC power source, the output terminal of the input rectification and filtering unit is connected to the input terminal of the high-frequency conversion unit, the output terminal of the high-frequency conversion unit is connected to the input terminal of the output rectification and regulation unit, the output terminal of the output rectification and regulation unit serves as the voltage output terminal of the power adapter, the input terminal of the feedback control unit serves as the feedback input terminal of the power adapter, and the output terminal of the feedback control unit is connected to the feedback terminal of the output rectification and regulation unit.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A power supply device for a MiniLED display device, characterized in that, Includes a power adapter and a signal acquisition circuit, a zone backlight control module, and a DC voltage conversion module disposed within the MiniLED display device; The power adapter's power input terminal is connected to an AC power source, its feedback input terminal is connected to a feedback signal, and its voltage output terminal is connected to the voltage input terminals of the partition backlight control module and the DC voltage conversion module, respectively. The input terminal of the signal acquisition circuit is connected to the backlight LED of the MiniLED display device, and the signal output terminal of the signal acquisition circuit outputs a feedback signal. The voltage output terminal of the partition backlight control module is connected to the voltage input terminal of the backlight LED of the MiniLED display device; the DC voltage conversion module is a DC / DC constant voltage module, and the voltage output terminal of the DC voltage conversion module is connected to the power supply input terminal of the mainboard of the MiniLED display device.

2. The power supply device for a MiniLED display device according to claim 1, characterized in that, The power adapter is connected to the MiniLED display device via a three-core cable, which contains a power line, a ground line, and a feedback line.

3. The power supply device for a MiniLED display device according to claim 1, characterized in that, The signal acquisition circuit is an LED driving voltage amplitude signal acquisition circuit.

4. The power supply device for a MiniLED display device according to claim 1, characterized in that, The signal acquisition circuit is an LED drive current signal acquisition circuit.

5. The power supply device for a MiniLED display device according to claim 1, characterized in that, The signal acquisition circuit includes a photoelectric sensor, which is used to acquire the light intensity of the backlight LED of the MiniLED display device and generate a feedback signal.

6. The power supply device for a MiniLED display device according to claim 1, characterized in that, The feedback signal output by the signal acquisition circuit is either a PWM signal or an analog level signal.

7. The power supply device for a MiniLED display device according to claim 1, characterized in that, The power adapter is one of the following: a switching AC / DC power supply, a linear AC / DC power supply, and a programmable AC / DC power supply.

8. The power supply device for a MiniLED display device according to claim 1, characterized in that, The power adapter includes an input rectification and filtering unit, a high-frequency conversion unit, an output rectification and regulation unit, and a feedback control unit. The input terminal of the input rectification and filtering unit is connected to an AC power source, the output terminal of the input rectification and filtering unit is connected to the input terminal of the high-frequency conversion unit, the output terminal of the high-frequency conversion unit is connected to the input terminal of the output rectification and regulation unit, the output terminal of the output rectification and regulation unit serves as the voltage output terminal of the power adapter, the input terminal of the feedback control unit serves as the feedback input terminal of the power adapter, and the output terminal of the feedback control unit is connected to the feedback terminal of the output rectification and regulation unit.

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