A power-adjustable display device

Abstract

The application discloses a power-adjustable display device, and belongs to the technical field of display. The display device comprises a display screen, a mainboard, a power board and a power management module. The mainboard is used for driving the display screen and outputting a video signal, and the power board is used for supplying power for the display screen, the mainboard and an external device. The maximum output power of the power board is less than the sum of the maximum power consumptions of the display screen, the mainboard and the external device, so that the power board does not need to adopt a large-specification power device matched with the sum of the maximum power consumptions of the loads. The power management module is used for dynamically distributing the power outputted by the power board to the loads according to the current use scene of the display device, so that the total power consumption of the display device does not exceed the maximum output power of the power board. The application reduces the maximum output power specification of the power board, avoids the use of a large-specification power device, and effectively reduces the hardware cost of the display device on the premise of guaranteeing normal use experience of a user.

Description

Technical Field

[0001] This application belongs to the field of display device technology, and particularly relates to a power-adjustable display device. Background Technology

[0002] Currently, display devices such as electronic whiteboards, all-in-one conference machines, and large educational screens typically integrate multiple functional modules, including the display screen, motherboard, power board, and various external devices such as pluggable computers (OPS computers), speakers, and USB peripherals. The power board, as an AC-DC switching power supply, primarily performs two functions: first, it rectifies high-voltage AC power into low-voltage DC power to supply the display screen, motherboard, and pluggable computers (constant voltage source section); second, it rectifies AC power into a high-voltage constant current source to power the display screen's backlight (constant current source section). Taking an 86-inch smart all-in-one machine as an example, the constant current source backlight power is approximately 230W, and the constant voltage source powering the motherboard, display screen, and pluggable computers is approximately 210W, totaling approximately 440W.

[0003] In traditional display device design, the power supply board's power specification is determined by the total power required for all functional modules to operate at full load simultaneously. In other words, the sum of the power of the constant voltage and constant current sources on the power supply board must meet the total power demand when all loads are simultaneously at maximum power consumption. This necessitates the use of large-scale power devices in the EMI filtering and PFC (Power Factor Correction) sections of the power supply board to meet power handling capabilities of 440W or even higher, resulting in a significant increase in the hardware cost of the power supply board.

[0004] However, in real-world usage scenarios, the various functional modules of a display device do not simultaneously operate at maximum power consumption. For example, when a pluggable computer is powered on and used as an input source, the motherboard does not need to run computationally intensive applications, significantly reducing its power consumption. Similarly, user actions such as adjusting backlight brightness, volume, or plugging in USB devices all affect the real-time power consumption of each module. Therefore, designing the power board's maximum output power based on the extreme case of "all functions running at full capacity" results in wasted power device specifications and increased overall system cost. Thus, how to reduce the hardware cost of the display device's power supply section without affecting the user experience has become a pressing technical problem in this field. Summary of the Invention

[0005] In view of this, the present application provides a power-adjustable display device that can solve the technical problem that existing display devices require the use of large-scale power devices and have high hardware costs because the power board is configured according to the total power of all functional modules operating at full load at the same time.

[0006] This application provides a power-adjustable display device, comprising: Display screen; The motherboard is used to drive the display screen and output video signals; A power board is used to supply power to the display screen, the motherboard, and external devices; The maximum output power of the power board is less than the sum of the maximum power consumption of the display screen, the motherboard and the external device, so that the power board does not need to use large-scale power devices that match the sum of the maximum power consumption of each load. The display device also includes a power management module, which is used to dynamically allocate the power output from the power board to each load according to the current usage scenario of the display device, so that the total power consumption of the display device does not exceed the maximum output power of the power board.

[0007] In one possible implementation, the external device includes a pluggable computer and a speaker; The power management module is used for: When the pluggable computer is off, the backlight of the display is allowed to operate at maximum power, the motherboard is allowed to operate at the highest operating frequency, and the speakers are allowed to operate at maximum output power. When the pluggable computer is turned on and used as an input source, the operating frequency of the motherboard is reduced to below a preset low frequency threshold, and the power of the backlight and / or the power of the speaker is allocated based on the remaining power after subtracting the current power consumption of the pluggable computer from the maximum output power of the power board.

[0008] In one possible implementation, the power management module is further configured to: When the pluggable computer is turned on and the backlight power exceeds the first threshold, the operating frequency of the motherboard is reduced to below the preset low frequency threshold. Based on the maximum output power of the power board, the power consumption of the pluggable computer, the power consumption of the motherboard, and the power consumption of the currently connected USB peripherals, the upper limit of the allocable power of the backlight and / or the speaker is calculated.

[0009] In one possible implementation, the power supply voltage of the speaker can be switched between a first voltage and a second voltage; The power management module is used for: When the pluggable computer is turned off, the speaker is controlled to be powered by the first voltage to support the speaker to output maximum power; When the pluggable computer is turned on and used as an input source, the speaker is controlled to switch to the second voltage power supply, and the first voltage power supply line is dedicated to the pluggable computer.

[0010] In one possible implementation, the first voltage is higher than the second voltage; The maximum output power of the speaker when powered by the first voltage is greater than the maximum output power when powered by the second voltage.

[0011] In one possible implementation, the display device further includes an ambient light sensor; The power management module is also used for: When the total power consumption exceeds the maximum output power of the power board, the backlight brightness of the display screen is reduced according to the ambient light brightness detected by the ambient light sensor, so that the total power consumption falls back below the maximum output power.

[0012] In one possible implementation, the display device further includes an external speaker interface for connecting an external active speaker; The power management module is also used for: When the external active speaker is detected to be connected, the external active speaker is activated by a preset control signal, and the built-in speaker is turned off to release the power budget occupied by the built-in speaker.

[0013] In one possible implementation, the power management module confirms the connection status of the external active speaker through insertion detection or a preset communication method; When the total power consumption exceeds the maximum output power of the power board, the built-in speaker is turned off first and the external active speaker is turned on.

[0014] In one possible implementation, the pluggable computer and the motherboard exchange status via a UART communication interface within the pluggable interface; The power management module obtains the current operating status information of the pluggable computer through the UART communication interface. The operating status information includes program running status and / or CPU utilization, and determines the current power consumption of the pluggable computer based on the operating status information.

[0015] In one possible implementation, the power management module adjusts the power allocation in response to a system event, which includes at least one of: switching the signal source, adjusting the brightness, adjusting the volume, or inserting or removing a USB device.

[0016] The power adjustment display device provided in this application sets the maximum output power of the power board to be less than the sum of the maximum power consumption of all loads, and uses a power management module to dynamically allocate power according to the current usage scenario. This avoids the need for the power board to use large-scale power devices that match the sum of the maximum power consumption of each load, thereby reducing the hardware cost of the power board and the overall cost of the device. Simultaneously, by performing refined power allocation for different usage scenarios, it achieves rational utilization of power while ensuring a normal user experience. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A block diagram of an electrical system for a display device with power adjustment provided in an embodiment of this application; Figure 2 Electrical connection block diagram of the motherboard provided in the embodiments of this application; Figure 3 This application provides a graph showing the relationship between display brightness and backlight power in an embodiment. Figure 4 A block diagram of speaker power supply logic control provided in an embodiment of this application; Figure 5 This is a schematic diagram of external speaker control provided in an embodiment of this application; Figure 6 This is one of the schematic diagrams of the system event triggering process provided in the embodiments of this application; Figure 7 This is the second schematic diagram of the system event triggering process provided in the embodiments of this application. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, this application embodiment provides a power-adjustable display device, including a display screen, a motherboard, a power board, and an external device (e.g., a pluggable computer, also known as an OPS computer). The display screen is used to display content; the motherboard is used to drive the display screen and output video signals to the display screen; the pluggable computer acts as a signal source, transmitting video signals to the motherboard through a pluggable interface; the power board supplies power to the display screen, the display screen's backlight, the motherboard, and the external device.

[0025] The power supply board, as an AC-DC switching power supply, mainly consists of two parts: a constant voltage source and a constant current source. The constant voltage source is used to rectify high-voltage AC power into low-voltage DC power to power the motherboard, display screen (excluding backlight), and pluggable computer; the constant current source is used to rectify AC power into a high-voltage constant current source to power the backlight of the display screen.

[0026] In this application, the maximum output power of the power supply board is less than the sum of the maximum power consumption of the display, motherboard, and external devices. In other words, the power supply board is not designed with all loads operating at maximum power consumption simultaneously, but rather with a power consumption less than that sum. This eliminates the need for the power supply board to use large-scale power devices (such as large-scale EMI filters, PFC power devices, etc.) that match the sum of the maximum power consumption of each load, thereby reducing the hardware cost of the power supply board.

[0027] The display device also includes a power management module, which dynamically allocates the power output from the power board to each load according to the current usage scenario of the display device, so that the total power consumption of the display device does not exceed the maximum output power of the power board.

[0028] The specific implementation of the power management module is described in detail below with reference to several embodiments. For ease of understanding, the following embodiments use an 86-inch smart all-in-one machine as an example, but the scope of protection of this application is not limited thereto.

[0029] Example 1: Power Allocation Based on the Operating Status of a Pluggable Computer Figure 2 This is a block diagram of the electrical connection of the motherboard provided in an embodiment of this application.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, the external devices include a pluggable computer and speakers. The rated maximum output power of the power supply board is set to 350W, of which the maximum output power of the constant current source section is 230W and the maximum output power of the constant voltage source section is 210W. The maximum power consumption of each load is as follows: backlight maximum power 230W, pluggable computer maximum power 90W, motherboard and display (excluding backlight) maximum power 60W, speaker maximum power 40W, USB peripheral maximum power 20W. The sum of the maximum power consumption of all loads is 440W, which is greater than the maximum output power of the power supply board of 350W.

[0031] The power management module in this embodiment performs the following power allocation based on the on or off state of the pluggable computer: Scenario 1: When a detachable computer is turned off When the detachable computer is powered off, it does not consume power from the constant voltage source. At this time, the power management module allows the display backlight to operate at maximum power (230W), the motherboard to run at its highest operating frequency (i.e., supporting full motherboard performance output, with power consumption up to 60W), and the speakers to operate at maximum output power (40W). The total power consumption at this time is 230W + 60W + 40W + 20W (USB peripherals at full power) = 350W, which is exactly equal to the power board's maximum output power.

[0032] In this scenario, users can obtain the best display brightness, motherboard processing performance, and audio output experience.

[0033] Scenario 2: When a pluggable computer is turned on and used as an input signal source. When the pluggable computer is powered on and used as the input source, the display device primarily relies on the pluggable computer for computing power and video content. The motherboard only needs to handle screen driving and video signal forwarding, without running computationally intensive applications or tasks. At this time, the power management module reduces the motherboard's operating frequency to below a preset low-frequency threshold, ensuring that the motherboard's power consumption does not exceed 35W.

[0034] Since the power consumption of the pluggable computer as an input source is approximately 90W, the motherboard power consumption is approximately 35W, and the constant voltage source has already consumed 125W, the remaining power budget is 350W - 125W = 225W. The power management module allocates the power of the backlight and / or the speaker based on this remaining power.

[0035] For example: If the speaker operates at its maximum power of 40W and the USB peripheral operates at its full power of 20W, then the usable backlight power is 350W - 90W - 35W - 40W - 20W = 165W, corresponding to a backlight brightness of approximately 61% (based on...). Figure 3 (Calculation of the linear relationship between brightness and power).

[0036] If the speaker operates at its maximum power of 40W and no USB peripherals are used, the available backlight power is 350W-90W-35W-40W=185W, corresponding to a backlight brightness of approximately 73%.

[0037] If the speakers and USB peripherals are both turned off, the available backlight power is 350W-90W-35W=225W, corresponding to a backlight brightness of approximately 97%.

[0038] Through the above dynamic allocation, in scenarios where a pluggable computer is turned on and used as a signal input source, although the maximum output power of the power board is only 350W, which is less than the sum of the maximum power consumption of each load (440W), the total power consumption of the system will never exceed 350W through the allocation of the power management module, and users can obtain an acceptable user experience in different usage scenarios.

[0039] Example 2: Power Allocation Based on Backlight Power Threshold This embodiment is a further refinement of Embodiment 1. The power management module is also used to: reduce the motherboard's operating frequency to below a preset low frequency threshold when the pluggable computer is turned on and the backlight power exceeds a first threshold.

[0040] In this embodiment, the first threshold can be set to 130W. When the pluggable computer is turned on and the backlight power exceeds 130W (i.e., the backlight brightness exceeds about 40% of the power board's maximum output power), the power management module determines that the current system power consumption is high and actively reduces the motherboard's operating frequency to below a preset low frequency threshold, so that the motherboard power consumption does not exceed 35W.

[0041] Subsequently, the power management module calculates the maximum allocatable power for the backlight and / or speakers based on the power board’s maximum output power (350W), the current power consumption of the pluggable computer (90W), the current power consumption of the motherboard (not exceeding 35W), and the power consumption of the currently connected USB peripherals.

[0042] For example, when a pluggable computer is powered on, the backlight power exceeds 130W, the motherboard frequency is reduced to 35W, and the USB peripheral power consumption is 20W, the total usable power of the backlight and speakers is 350W - 90W - 35W - 20W = 205W. If the current backlight power is 150W, the upper limit of the usable speaker power is 55W, but limited by the speaker's own maximum power of 40W, the actual upper limit of the speaker power is 40W. The power management module controls the actual output power of the backlight and speakers accordingly to ensure that the total power consumption does not exceed 350W.

[0043] Example 3: Speaker power supply voltage switching In this embodiment, the power supply voltage for the speaker can be switched between a first voltage and a second voltage. For example... Figure 4 As shown, the power management module is used for: When the pluggable computer is turned off, the speaker is powered by a first voltage (e.g., 18V) to support the speaker's maximum output power (e.g., 40W).

[0044] When the pluggable computer is powered on and used as an input source, the control speaker switches to a second voltage (e.g., 12V) and dedicates the first voltage power supply line to the pluggable computer.

[0045] In this embodiment, the first voltage (18V) is higher than the second voltage (12V), and the maximum output power of the speaker when powered by the first voltage (40W) is greater than the maximum output power when powered by the second voltage (e.g., 20W-25W).

[0046] Through the voltage switching mechanism described above, when a pluggable computer is turned on, the 18V power supply line is preferentially allocated to the pluggable computer (whose rated operating voltage is usually 18V), while the speakers are switched to 12V power supply. This avoids the simultaneous connection of high-power loads on the same voltage power supply line, thereby reducing the maximum current requirement and power device specifications of the 18V power supply line, and further reducing the cost of the power board.

[0047] Example 4: Automatic Brightness Adjustment Based on Ambient Light Sensor In this embodiment, the display device may further include an ambient light sensor. The ambient light sensor is disposed on the bezel of the display device and is used to detect the ambient light brightness of the current usage environment.

[0048] The power management module is also used to: when the total power consumption exceeds the maximum output power of the power board, automatically reduce the backlight brightness of the display screen based on the ambient light brightness detected by the ambient light sensor, so that the total power consumption falls back below the maximum output power.

[0049] Specifically, when the total system power consumption exceeds 350W due to a sudden load (such as a peak current), the power management module obtains the ambient light brightness value collected by the ambient light sensor. If the current ambient light brightness is low (e.g., in a dark room), the power management module reduces the backlight brightness by a larger margin, because the human eye is highly sensitive to brightness at this time, and a small reduction in backlight brightness can significantly save power consumption without being noticeable to the user; if the current ambient light brightness is high (e.g., in a bright conference room), the power management module reduces the backlight brightness by a smaller margin to ensure that the screen content is still clearly visible under strong ambient light.

[0050] By introducing an ambient light sensor, automatic and intelligent adjustment of backlight brightness is achieved, ensuring that the total power consumption of the system does not exceed the maximum output power of the power board while guaranteeing the user's visual experience.

[0051] Example 5: Access Control of External Active Speakers In this embodiment, the display device also includes an external speaker interface (e.g., an S / PDIF interface or a Lineout interface) for connecting an external active speaker. The external active speaker has its own power supply and does not consume power from the display device's power board. Figure 5 This is a schematic diagram of external speaker control provided in an embodiment of this application.

[0052] The power management module is also used to: activate the external active speaker and turn off the built-in speaker by means of a preset control signal (such as a CEC control signal) when an external active speaker is detected to be connected, so as to release the power budget occupied by the built-in speaker.

[0053] Specifically, the power management module confirms the connection status of the external active speaker through insertion detection (e.g., detecting the plugging / unplugging status of the external speaker interface) or a preset communication method (e.g., CEC communication). When the total system power consumption exceeds the maximum output power of the power board (350W), the power management module prioritizes shutting down the built-in speaker and enabling the external active speaker.

[0054] For example, with a pluggable computer powered on, backlight operating at its maximum power of 230W, motherboard power consumption at 60W, and USB peripheral power consumption at 20W, the total system power consumption reaches 310W, leaving only 40W of power reserve. If the speakers need to operate at this point, using the built-in speakers (maximum power 40W) would push the total power consumption to the critical value of 350W, leaving no margin to handle sudden power fluctuations. When the power management module detects that an external active speaker is connected, it activates the external active speaker via a CEC control signal and shuts down the built-in speaker, releasing the 40W constant voltage source power reserve. This brings the total system power consumption back down to 310W, providing ample power margin for other loads and ensuring reliable system operation.

[0055] Example 6: Power Consumption Determination Based on UART Communication In this embodiment, the pluggable computer and the motherboard exchange status information via the UART communication interface within the pluggable interface. The UART (Universal Asynchronous Receiver / Transmitter) communication interface enables bidirectional data communication between the pluggable computer and the motherboard.

[0056] The power management module obtains the current operating status information of the pluggable computer through the UART communication interface. This operating status information includes program running status and / or CPU utilization. Based on this operating status information, the power management module determines the current power consumption of the pluggable computer.

[0057] For example, when the power management module detects via the UART communication interface that the pluggable computer's CPU utilization is 10% and it is currently only running word processing software, it determines that the pluggable computer is in a low-power operating state, with its current power consumption being approximately 30W-50W, rather than the maximum power consumption of 90W. In this case, the power management module can allocate more power budget to the backlight and speakers to enhance the user's visual and auditory experience.

[0058] For example, when the power management module detects that the CPU utilization of the pluggable computer is 90% and it is running large 3D modeling software, it determines that the pluggable computer is in a high-power operation state, with its current power consumption approaching 90W. At this time, the power management module will correspondingly reduce the backlight brightness or speaker power to ensure that the total power consumption does not exceed 350W.

[0059] By acquiring the real-time operating status of the pluggable computer through the UART communication interface, the power management module can more accurately grasp the real-time power consumption of each load, thereby enabling more refined and dynamic power allocation.

[0060] Example 7: Power Allocation Adjustment Triggered by System Events Figure 6 This is one of the schematic diagrams of the system event triggering process provided in the embodiments of this application; Figure 7This is the second schematic diagram of the system event triggering process provided in the embodiments of this application.

[0061] In this embodiment, as Figure 6 and Figure 7 As shown, the power management module adjusts power allocation in response to system events. System events include at least one of the following: switching the signal source, adjusting brightness, adjusting volume, and inserting or removing a USB device.

[0062] Specifically, when a system event occurs, such as when a user switches the signal source from HDMI to a pluggable computer via remote control or touch operation, when a user increases or decreases the screen brightness, increases or decreases the volume, or when a user inserts or removes a USB storage device, the power management module is triggered to execute a power redistribution process: First, confirm the current working status of the pluggable computer (whether it is on or off, and its running status information such as CPU usage). Secondly, determine the backlight power corresponding to the current backlight brightness; Then, determine the current speaker output power; Next, determine the power consumption of currently connected power-consuming peripherals such as USB devices; Finally, based on the above information, the current total power consumption of the system is calculated. If the current total power consumption exceeds the maximum output power of the power board (350W), the power of each load is reduced according to the preset priority strategy (e.g., first reduce the backlight power, then reduce the speaker power, and finally limit the power of USB peripherals, etc.) until the total power consumption does not exceed 350W.

[0063] Power allocation adjustments triggered by system events enable real-time and dynamic power management. When user operations cause changes in system power consumption, the system can respond promptly and redistribute power to ensure that the system always operates within a safe power range.

[0064] Technical Performance Verification: Taking an 86-inch smart all-in-one machine as an example, in traditional designs, the power board needs to meet the simultaneous full-load requirements of a 230W constant current source and a 210W constant voltage source, resulting in a total power of 440W. This necessitates the use of large-specification EMI filter components and PFC power devices, leading to high power board costs. With the technical solution proposed in this application, the maximum output power of the power board is designed to be 350W, and the maximum output power of the constant voltage source is correspondingly reduced, allowing the use of smaller power devices. Calculations show that the hardware cost of the power board can be reduced by approximately 15%-20%. Furthermore, through the dynamic allocation of power by the power management module in different scenarios, the user experience is not significantly affected in various usage scenarios.

[0065] In summary, this application achieves a low-cost design for display devices by setting the maximum output power of the power board to be less than the sum of the maximum power consumption of each load, and by using the power management module to dynamically allocate power according to the current usage scenario, while ensuring the user experience in different usage scenarios.

[0066] It should be noted that: Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0067] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of this application, various features of this application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0068] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0069] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0070] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A power-adjustable display device, characterized in that, include: Display screen; The motherboard is used to drive the display screen and output video signals; A power board is used to supply power to the display screen, the motherboard, and external devices; The maximum output power of the power board is less than the sum of the maximum power consumption of the display screen, the motherboard and the external device, so that the power board does not need to use large-scale power devices that match the sum of the maximum power consumption of each load. The display device also includes a power management module, which is used to dynamically allocate the power output from the power board to each load according to the current usage scenario of the display device, so that the total power consumption of the display device does not exceed the maximum output power of the power board.

2. The display device according to claim 1, characterized in that, The external devices include a pluggable computer and speakers; The power management module is used for: When the pluggable computer is off, the backlight of the display is allowed to operate at maximum power, the motherboard is allowed to operate at the highest operating frequency, and the speakers are allowed to operate at maximum output power. When the pluggable computer is turned on and used as an input source, the operating frequency of the motherboard is reduced to below a preset low frequency threshold, and the power of the backlight and / or the power of the speaker is allocated based on the remaining power after subtracting the current power consumption of the pluggable computer from the maximum output power of the power board.

3. The display device according to claim 2, characterized in that, The power management module is also used for: When the pluggable computer is turned on and the backlight power exceeds the first threshold, the operating frequency of the motherboard is reduced to below the preset low frequency threshold. Based on the maximum output power of the power board, the power consumption of the pluggable computer, the power consumption of the motherboard, and the power consumption of the currently connected USB peripherals, the upper limit of the allocable power of the backlight and / or the speaker is calculated.

4. The display device according to claim 2, characterized in that, The power supply voltage of the speaker can be switched between a first voltage and a second voltage; The power management module is used for: When the pluggable computer is turned off, the speaker is controlled to be powered by the first voltage to support the speaker to output maximum power; When the pluggable computer is turned on and used as an input source, the speaker is controlled to switch to the second voltage power supply, and the first voltage power supply line is dedicated to the pluggable computer.

5. The display device according to claim 4, characterized in that, The first voltage is higher than the second voltage; The maximum output power of the speaker when powered by the first voltage is greater than the maximum output power when powered by the second voltage.

6. The display device according to claim 2, characterized in that, The display device also includes an ambient light sensor; The power management module is also used for: When the total power consumption exceeds the maximum output power of the power board, the backlight brightness of the display screen is reduced according to the ambient light brightness detected by the ambient light sensor, so that the total power consumption falls back below the maximum output power.

7. The display device according to claim 2, characterized in that, The display device also includes an external speaker interface for connecting an external active speaker; The power management module is also used for: When the external active speaker is detected to be connected, the external active speaker is activated by a preset control signal, and the built-in speaker is turned off to release the power budget occupied by the built-in speaker.

8. The display device according to claim 7, characterized in that, The power management module confirms the connection status of the external active speaker through insertion detection or a preset communication method; When the total power consumption exceeds the maximum output power of the power board, the built-in speaker is turned off first and the external active speaker is turned on.

9. The display device according to claim 2, characterized in that, The pluggable computer and the motherboard exchange status information through the UART communication interface in the pluggable interface. The power management module obtains the current operating status information of the pluggable computer through the UART communication interface. The operating status information includes program running status and / or CPU utilization, and determines the current power consumption of the pluggable computer based on the operating status information.

10. The display device according to claim 1, characterized in that, The power management module adjusts power allocation in response to system events, including at least one of: switching the signal source, adjusting brightness, adjusting volume, and inserting or removing a USB device.

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