Power management method for display device, power management device and display device

Abstract

The present application belongs to the field of power management of display devices. The display device is connected to an external device via a USB‑C interface. The power management method includes detecting whether the display device has entered a sleep state. If the display device has entered the sleep state, a sleep detection signal is generated. A first power role switching signal is sent to the external device based on the sleep detection signal to switch the state of the external device to a power supply state. At this time, the display device is in a powered state and does not power the external device. This reduces the power consumption of the display device when the external device is in sleep mode via the USB‑C interface, thereby improving the energy efficiency of the display device.

Description

Technical Field

[0001] The present application relates to the field of power management for display devices, and in particular to a power management method for display devices, a power management device, and a display device. Background Art

[0002] With the development of electronic technology, the USB-C interface has become a standard interface for smart devices such as mobile phones and computers. The peripheral devices of these smart devices are also equipped with USB-C interfaces, such as USB-C display devices. Most display devices with USB-C interfaces can not only display the screen of the mobile phone / computer through the USB-C interface, but also power the mobile phone / computer at the same time. When a USB-C display device with its own power supply (including a built-in battery and an external power adapter) powers the connected mobile phone / computer and displays the screen, after no one operates the mobile phone / computer for a period of time, the mobile phone / computer will enter sleep mode and stop outputting the screen. The USB-C display device will then enter sleep mode, presenting a black screen state with no picture. At this time, the USB-C display device is still supplying power to the mobile phone / computer. The existing technology of still charging external devices when the USB-C display device is in sleep mode increases the power consumption of the display device when it is in sleep mode, and fails to meet energy efficiency requirements. Summary of the Invention

[0003] The purpose of this application is to provide a power management method, a power management device and a display device for a display device, aiming to solve the problems of high power consumption and low energy efficiency when the display device is in sleep mode.

[0004] In a first aspect, the present application provides a power management method for a display device, wherein the display device is connected to an external device via a USB-C interface, wherein the power management method comprises:

[0005] Detecting whether the display device enters a dormant state;

[0006] If the display device enters the sleep state, generating a sleep detection signal;

[0007] A first power role switching signal is sent to the external device according to the sleep detection signal to switch the state of the external device to a power supply state.

[0008] In one embodiment, detecting whether the display device enters a sleep state includes:

[0009] Acquire a display signal from the external device via the USB-C interface;

[0010] If the display signal is not received, it is determined that the display device enters the sleep state.

[0011] In one embodiment, the power management method further includes:

[0012] If the display device enters the sleep state, the power supply connection line between the display device and the external device is controlled to be disconnected.

[0013] In one embodiment, the display device outputs a first power role switching signal to an external device. After receiving the first power role switching signal, the external device sets the external device as a power supply device and sets the display device as a power receiving device.

[0014] In one embodiment, the power management method further includes:

[0015] If the display device enters the display state, a start detection signal is generated;

[0016] A second power role switching signal is sent to the external device according to the power-on detection signal, so as to switch the state of the external device to a power receiving state.

[0017] In one embodiment, the power management method further includes:

[0018] If the display device enters the display state, the power supply connection line between the display device and the external device is controlled to be turned on.

[0019] In another aspect, the present application provides a power management device for a display device, the power management device comprising:

[0020] a detection unit, configured to detect whether the display device has entered a sleep state; and generate a sleep detection signal if the display device has entered the sleep state;

[0021] The switching unit is configured to send a first power role switching signal to the external device according to the sleep detection signal, so as to switch the state of the external device to a power supply state.

[0022] In one embodiment, the detection unit is further configured to generate a start detection signal when the display device enters a display state;

[0023] The switching unit is further configured to send a second power role switching signal to the external device according to the power-on detection signal, so as to switch the state of the external device to a power receiving state.

[0024] In a second aspect, the present application provides a display device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above methods when executing the computer program.

[0025] In one embodiment, the display device further includes a display panel unit, and the display panel unit is configured to display a display signal input from an external device to the display device.

[0026] The display device is connected to an external device via a USB-C interface. The power management method includes detecting whether the display device has entered a sleep state. If the display device has entered the sleep state, a sleep detection signal is generated, and a first power role switching signal is sent to the external device according to the sleep detection signal to switch the state of the external device to a power supply state. At this time, the display device is in a powered state, and the display device does not power the external device, thereby reducing the power consumption of the display device when the external device is in sleep state via the USB-C interface, and improving the energy efficiency of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 A flowchart of a power management method for a display device provided in one embodiment of the present application;

[0029] Figure 2 A flowchart of detecting whether a display device has entered a sleep state according to an embodiment of the present application is provided;

[0030] Figure 3 A flowchart of a power management method for a display device provided in one embodiment of the present application;

[0031] Figure 4 A flowchart of a power management method for a display device provided in one embodiment of the present application;

[0032] Figure 5 A flowchart of a power management method for a display device provided in one embodiment of the present application;

[0033] Figure 6 This is a structural block diagram of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0038] Typical display devices typically have a USB-C port, which can connect to external devices such as mobile phones or tablets and transmit data from the external devices to the display device. When a mobile phone or tablet is connected to the display device via the USB-C port, the display device will power the external device through the USB-C port. After a period of unattended operation, the display device will enter a dormant state. During this state, the display device will not display any images, but will appear black. However, the display device will still power the external device, increasing the display device's power consumption. To reduce the display device's power consumption during dormancy, the user needs to manually unplug the USB-C data cable between the external device and the display device, thereby reducing the display device's power consumption.

[0039] However, manually unplugging the USB-C data cable is inefficient, and users often forget to unplug the cable. This increases the power consumption of the display device during sleep mode and reduces the energy efficiency of the display device.

[0040] In order to solve the above problems, an embodiment of the present application provides a sleep method for a display device, which is used to solve the problem of high power consumption when an external device of the display device is in sleep mode. The display device is connected to the external device via a USB-C interface.

[0041] like Figure 1A schematic diagram of an implementation flow of a power management method for a display device provided in an embodiment of the present application is shown. The method is applicable to powering a display device when it is connected to an external device via a data line, and includes steps 100 to 300.

[0042] Step 100: Detect whether the display device enters a sleep state from a display state.

[0043] The display device includes a USB-C interface, and an external device can be connected to the display device via the USB-C interface. When the external device transmits a display signal to the display device, the display device is in a display state. At this time, the display device supplies power to the external device, and while the external device is charging, it simultaneously outputs a display signal to the display device for display. When neither the external device nor the display device is operated for a first threshold time, the external device no longer outputs a display signal to the display device, and the display device enters a sleep state. The display device displays a black screen, and a detection unit within the display does not detect the display signal output by the external device, thereby determining that the display device has entered a sleep state.

[0044] In this embodiment, the detection unit can detect whether the display device switches from the display state to the sleep state or switches from the sleep state to the display state, thereby realizing the detection of the state of the display device.

[0045] In step 200 , if the display device enters a sleep state, a sleep detection signal is generated.

[0046] The display device may be detected when entering the sleep state from the display state by the detection unit. When the detection unit detects that the display device enters the sleep state from the display state, the detection unit generates a sleep detection signal according to the display device entering the sleep state.

[0047] In this embodiment, the detection unit can detect the display state and the sleep state of the display device, and generate a sleep detection signal when the display device is in the sleep state.

[0048] Step 300 : Sending a first power role switching signal to the external device according to the sleep detection signal to switch the state of the external device to a power supply state.

[0049] Among them, the detection unit generates a sleep detection signal and sends it to the switching unit inside the display device. The switching unit sends a first power role switching signal to the external device through the USB-C interface. After receiving the first power role switching signal, the external device switches the state of the external device to the power supply state and controls the display device to be converted into the power receiving state.

[0050] In this embodiment, when the switching unit receives the sleep detection signal, it generates a first power role switching signal to control the external device to switch from the powered state to the power supply state, and controls the display device to switch from the power supply state to the powered state through the external device. The display device does not power the external device, thereby reducing the problem of high power consumption of the display device when the external device is in sleep mode and improving the energy efficiency of the display.

[0051] In one embodiment, see Figure 2 As shown, detecting whether the display device enters the sleep state includes steps 101 and 102:

[0052] Step 101: Obtain a display signal from an external device via a USB-C interface.

[0053] In this embodiment, see Figure 2 As shown, the external device outputs a display signal to the display device through the USB-C port. The display signal passes through the USB-C interface unit, the image inversion unit, and the display signal processing unit in the display device to reach the display panel unit for display, wherein the display signal processing unit includes a detection unit.

[0054] Step 102: If no display signal is received, it is determined that the display device enters a dormant state.

[0055] In this embodiment, the display signal needs to be processed by the signal processing unit and then output to the display panel unit for display. When the external device stops operating for a period of time, the external device will stop outputting the display signal to the display device. At this time, no display signal passes through the signal processing unit, and the detection unit does not detect the sleep signal, then it is determined that the display device has entered the sleep state.

[0056] In this embodiment, the detection unit can determine whether the external device outputs a display signal to the display device. When the detection unit does not receive the display signal, it determines that the display device is in a sleep state, and outputs a sleep detection signal to control the display device to stop supplying power to the external device, thereby reducing the power consumption of the display device when the external device is in sleep state.

[0057] In one embodiment, see Figure 3 As shown, the power management method further includes step 400:

[0058] Step 400: If the display device enters the sleep state, the power supply connection line between the display device and the external device is controlled to be disconnected.

[0059] In one specific embodiment, a power supply connection is provided between the external device and the display device, and the power supply connection is controlled by a first switch unit. If the external device is not operated for a long period of time, it will stop outputting display signals, thereby controlling the display device to sleep. At this time, the external device will send a first power switch signal to the switch unit in the display device, and the switch unit will control the first switch unit to turn off. At this time, although the external device switches to the power supply device, because the first switch unit is in the off state, the external device cannot power the display device.

[0060] In this embodiment, when the external device does not output a display signal to the display device, it can output a first power switch signal to the switching unit. After receiving the first power switch signal, the switching unit controls the first switch unit to turn off, thereby preventing the external device from powering the display device.

[0061] In one embodiment, the display device outputs a first power role switching signal to an external device. After receiving the first power role switching signal, the external device sets the external device as a power supply device and sets the display device as a power receiving device.

[0062] In a specific embodiment, the switching unit in the display device outputs a first power role switching signal to the external device through the USB-C interface when the display device is in a sleep state. After receiving the first power role switching signal, the external device sets the external device as a power supply device and controls the display device to switch to a powered device. At this time, since the display device is a powered device, it will not output a power signal to the external device.

[0063] In this embodiment, by inputting a first power role switching signal to the external device, the external device can be set as a power supply device and the display device can be set as a power receiving device. The display device stops outputting power signals to the external device, and the power consumption of the display device is reduced during sleep mode, thereby improving the power consumption of the display device.

[0064] In one embodiment, see Figure 4 As shown, the power management method for a display device further includes steps 500 and 600, wherein:

[0065] Step 500: If the display device enters the display state, a start detection signal is generated.

[0066] Specifically, the external device outputs a display signal to the display device. The detection unit in the display device detects the display signal and determines that the display device enters the display state at this time. The detection unit generates and outputs a start detection signal, wherein the start detection signal is a high-level pulse and the sleep detection signal can be a low-level pulse, or the start detection signal is a low-level pulse and the sleep signal is a high-level pulse. When the display device switches from the sleep state to the display state, the pulse output by the detection unit will change from a high level to a low level or from a low level to a high level.

[0067] In this embodiment, the display device switches from the sleep state to the display state, which is detected by the detection unit, thereby realizing detection of the state of the display device and generating a start detection signal when the display device is in the display state.

[0068] Step 600: Send a second power role switching signal to the external device according to the power-on detection signal to switch the state of the external device to a power receiving state.

[0069] Specifically, the detection unit generates a power-on detection signal and sends it to the switching unit in the display device. The switching unit sends a second power role switching signal to the external device through the USB-C interface. After receiving the second power role switching signal, the external device switches the state of the external device to the powered state and controls the display device to switch to the powered state.

[0070] In this embodiment, when the switching unit receives the sleep signal, it generates a second power role switching signal to control the external device to switch from the power supply state to the power receiving state, and controls the display device to switch from the power receiving state to the power supply state through the external device. At this time, the display device supplies power to the external device, thereby solving the power supply problem of the external device.

[0071] In a specific embodiment, see Figure 5 As shown, the power management method further includes:

[0072] Step 700: If the display device enters the display state, the power supply connection line between the display device and the external device is controlled to be turned on.

[0073] Specifically, a power supply connection is provided between the external device and the display apparatus, and the power supply connection is controlled by a first switch unit. When the external device sends a display signal to the display apparatus, it simultaneously sends a second power switch signal to the switch unit in the apparatus. The switch unit controls the first switch unit to conduct, and the display apparatus then acts as a power supply terminal to supply power to the external device.

[0074] In this embodiment, while the external device outputs a display signal to the display device, it outputs a second power switch signal to the switching unit. After receiving the first power switch signal, the switching unit controls the first switch unit to turn on, thereby achieving the purpose of allowing the display to power the external device.

[0075] In one embodiment, combined Figure 6 As shown, the power management device includes:

[0076] A detection unit 1 is used to detect whether the display device enters a sleep state, and if the display device enters a sleep state, a sleep detection signal is generated;

[0077] The switching unit 2 is configured to send a first power role switching signal to the external device 6 according to the sleep detection signal, so as to switch the state of the external device 6 to the power supply state.

[0078] Specifically, as shown in the figure, the detection unit 1 is specifically used to detect whether the display device is used to detect whether the external device 6 outputs a display signal to the display panel unit 4 in the display device for display. When it is detected that the external device 6 does not output a display signal to the display device through the USB-C interface 3, it is determined that the display device has entered a sleep state, and a sleep detection signal is generated and output. The switching unit 2 is specifically used to receive the sleep detection signal output from the detection unit 1 and generate a first power role switching signal based on the sleep detection signal. The first power role switching signal is output to the external device and switches the state of the external device 6 to a power supply state. The switching unit 2 simultaneously controls the switch unit 5 to be turned off. At this time, although the external device is in a power supply state, the display device cannot be powered by the switch unit 5.

[0079] In one embodiment, the external device 6 controls the display device to switch to a power receiving state.

[0080] In this embodiment, the detection unit 1 detects whether the display device is in a sleep state by detecting whether the external device outputs a display image to the display device. When the display device is in a sleep state, the judgment device outputs a sleep detection signal to control the switching unit 2 to switch the external device state to a power supply state. The external device 6 sets the display device to a powered state. At this time, the display device does not supply power to the external device, thereby effectively reducing the power consumption of the display device when it is in sleep state.

[0081] In one embodiment, the detection unit is further configured to generate a start detection signal when the display device enters a display state.

[0082] The switching unit is further configured to send a second power role switching signal to the external device according to the start-up detection signal, so as to switch the state of the external device to a power receiving state.

[0083] Specifically, the external device outputs a display signal to the display device, which is then displayed on the display panel after passing through the detection unit. The detection unit detects the display signal and determines that the display device is in a display state. At this point, the detection unit generates and outputs a power-on detection signal. Upon receiving the power-on detection signal, the switching unit generates and outputs a second power role switching signal to the external device, switching the external device to a powered state. The external device can simultaneously switch the display device to a powered state while switching to a powered state.

[0084] In this embodiment, the second power role switching signal controls the external device to switch to the power receiving state, and the external device controls the display device to switch to the power supply state. At this time, the display device supplies power to the external device through the power system, so that the external device can be charged while working.

[0085] In one embodiment, the external device may be a mobile phone, a tablet computer, or a computer.

[0086] In another aspect, the present invention provides a display device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the above method steps when executing the computer program.

[0087] It should be understood that in the embodiments of the present application, the processor referred to may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0088] In one embodiment, the display device further includes a display panel unit, and the display panel unit is used to display a display signal input from an external device to the display device.

[0089] In a specific embodiment, combining Figure 6As shown, the display panel unit 4 is connected to the switch unit 5 and the detection unit 1. An external power source can be used to power the display panel unit 4, the processor, and the central processing unit through the USB-C interface 3 and the switch unit 5, or the display device's power adapter can be used to power the display panel unit 4, the processor, and the central processing unit. The external device 6 outputs a display signal through the USB-C interface 3 and the detection unit 1 to the display panel unit 4 for display.

[0090] In one embodiment, combined Figure 6 As shown, the display signal output by the external device 6 is processed by the signal processor and then displayed on the display panel unit 4.

[0091] The display device is connected to an external device via a USB-C interface. The power management method includes detecting whether the display device has entered a sleep state. If the display device has entered the sleep state, a sleep detection signal is generated, and a first power role switching signal is sent to the external device according to the sleep detection signal to switch the state of the external device to a power supply state. At this time, the display device is in a powered state, and the display device does not power the external device, thereby reducing the power consumption of the display device when the external device is in sleep state via the USB-C interface, and improving the energy efficiency of the display device.

[0092] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and circuits is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and circuits as needed, that is, the internal structure of the device can be divided into different functional units or circuits to complete all or part of the functions described above. The functional units and circuits in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and circuits are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and circuits in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0093] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0094] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0095] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0096] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A power management method for a display device, wherein the display device is connected to an external device via a USB-C interface, characterized in that: The power management method comprises: Detecting whether the display device enters a dormant state; If the display device enters the sleep state, generating a sleep detection signal; sending a first power role switching signal to the external device according to the sleep detection signal to switch the state of the external device to a power supply state, the display device not supplying power to the external device, and controlling the display device to switch from the power supply state to the power receiving state through the external device; The detecting whether the display device enters a dormant state includes: Acquire a display signal from the external device via the USB-C interface; If the display signal is not received, determining that the display device enters the sleep state; There is a power supply connection line between the external device and the display device, and the power supply connection line is controlled by a first switch unit; when the external device is not operated for a long time, the external device sends a first power switch signal to the switching unit in the display device, and the switching unit controls the first switch unit to be turned off.

2. The power management method for a display device according to claim 1, wherein: The power management method further includes: If the display device enters the sleep state, the power supply connection line between the display device and the external device is controlled to be disconnected.

3. The power management method for a display device according to claim 1, wherein: The display device outputs a first power role switching signal to an external device. After receiving the first power role switching signal, the external device sets the external device as a power supply device and sets the display device as a power receiving device.

4. The power management method for a display device according to claim 1, wherein: Also includes: If the display device enters the display state, a start detection signal is generated; A second power role switching signal is sent to the external device according to the power-on detection signal, so as to switch the state of the external device to a power receiving state.

5. The power management method for a display device according to claim 4, wherein: The power management method further includes: If the display device enters the display state, the power supply connection line between the display device and the external device is controlled to be turned on.

6. A power management device for a display device, characterized in that: The power management device comprises: a detection unit, configured to detect whether the display device has entered a sleep state; and generate a sleep detection signal if the display device has entered the sleep state; a switching unit, configured to send a first power role switching signal to the external device according to the sleep detection signal, so as to switch the state of the external device to a power supply state, the display device not supplying power to the external device, and control the display device to switch from the power supply state to the power receiving state through the external device; The power management device is also used to: obtain a display signal from the external device through the USB-C interface, and if the display signal is not received, determine that the display device has entered the sleep state; and, there is a power supply connection line between the external device and the display device, and the power supply connection line is controlled by a first switch unit. When the external device is not operated for a long time, the external device sends a first power switch signal to the switching unit in the display device, and the switching unit controls the first switch unit to be turned off.

7. The power management device according to claim 6, wherein: The detection unit is further configured to generate a start detection signal when the display device enters a display state; The switching unit is further configured to send a second power role switching signal to the external device according to the power-on detection signal, so as to switch the state of the external device to a power receiving state.

8. A display device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

9. The display device according to claim 8, wherein It also includes a display panel unit, which is used to display a display signal input from an external device to the display apparatus.

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