A display device and a display method of a variable refresh rate signal

Abstract

Some embodiments of the present application provide a display device and a display method of a variable refresh rate signal. The method can detect a target refresh rate of an input signal in response to a change event of the input signal. The input signal is a signal sent by an external device, and the target refresh rate can be a fixed refresh rate of a constant refresh rate signal or a base refresh rate of a variable refresh rate signal. A current screen parameter mode of the display device is obtained, and the screen parameter mode is set to a target screen parameter mode based on the target refresh rate and the current screen parameter mode. The display device is controlled to display a playing picture of the input signal according to the target screen parameter mode. The method sets different screen parameter modes through the fixed refresh rate or the base refresh rate of the input signal, so that the display device can display the playing picture of the input signal according to the corresponding screen parameter, thereby realizing the variable refresh rate function of the high refresh rate signal.

Description

[0001] This application is a divisional application of Chinese Patent Application No. CN202410463305.X, filed on April 17, 2024, entitled "A Display Device and a Method for Displaying a Variable Refresh Rate Signal", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display device technology, and in particular to a display device and a method for displaying a variable refresh rate signal. Background Technology

[0003] Display devices are intelligent devices capable of presenting a user interface and supporting user interaction. Taking smart TVs as an example, smart TVs are television products based on Internet application technology, equipped with open operating systems and chips, possessing open application platforms, enabling two-way human-computer interaction, and integrating multiple functions such as audio-visual, entertainment, and data to meet diverse and personalized user needs.

[0004] Display devices can be equipped with device interfaces, allowing for data interaction with external devices. For example, a display device can connect to external devices such as game consoles via a High Definition Multimedia Interface (HDMI), receiving input signals from these devices and displaying the corresponding playback image on the monitor. To improve image tearing and jitter, display devices are also equipped with a variable refresh rate function. This function allows the monitor to adjust the refresh rate in real time, ensuring smooth image display.

[0005] However, due to limitations in hardware performance such as LCD capabilities and driving voltage, the refresh rates supported by displays in display devices are limited, and the frequency range configured for variable refresh rate functions is also restricted to the range of refresh rates supported by the display. For example, if the display device has a 60Hz screen, the variable refresh rate configuration range can be between 48-60Hz. Thus, when the refresh rate of the input signal exceeds the refresh rate supported by the display, the display device cannot display the playback image of that input signal, increasing the limitations of the variable refresh rate function and affecting the user experience. Summary of the Invention

[0006] This application provides a display device and a method for displaying a variable refresh rate signal to solve the problem of high limitations in the variable refresh rate function of the display device.

[0007] In a first aspect, some embodiments of this application provide a display device, including a display, a device interface, and a controller. The display is configured to display a playback image of an input signal; the device interface is configured to connect to an external device and receive an input signal sent by the external device, wherein the input signal is a constant refresh rate signal or a variable refresh rate signal; the controller is configured to: In response to a change event of the input signal, a target refresh rate of the input signal is detected, wherein the target refresh rate is a fixed refresh rate of the constant refresh rate signal or a base refresh rate of the variable refresh rate signal; Get the current screen mode of the display device; Set the screen parameter mode to the target screen parameter mode, which is set based on the target refresh rate and the current screen parameter mode; Control the display to show the playback screen of the input signal according to the target screen parameter mode.

[0008] Secondly, some embodiments of this application provide a method for displaying a variable refresh rate signal, applied to a display device. The display device includes a display, a device interface, and a controller. The display is configured to display a playback image of an input signal. The device interface is configured to connect to an external device and receive an input signal sent by the external device. The input signal is a constant refresh rate signal or a variable refresh rate signal. The method includes: In response to a change event of the input signal, a target refresh rate of the input signal is detected, wherein the target refresh rate is a fixed refresh rate of the constant refresh rate signal or a base refresh rate of the variable refresh rate signal; Get the current screen mode of the display device; Set the screen parameter mode to the target screen parameter mode, which is set based on the target refresh rate and the current screen parameter mode; Control the display to show the playback screen of the input signal according to the target screen parameter mode.

[0009] As can be seen from the above technical solutions, the display device and variable refresh rate signal display method provided in some embodiments of this application can detect the target refresh rate of the input signal in response to a change event of the input signal. The input signal is a signal sent by an external device, and the target refresh rate can be a fixed refresh rate of a constant refresh rate signal or a base refresh rate of a variable refresh rate signal. The current screen parameter mode of the display device is then obtained, and the screen parameter mode is set to the target screen parameter mode based on the target refresh rate and the current screen parameter mode. The display is then controlled to display the playback screen of the input signal according to the target screen parameter mode. This method sets different screen parameter modes by using a fixed refresh rate or a base refresh rate of the input signal, enabling the display device to display the playback screen of the input signal according to the corresponding screen parameters, thereby realizing the variable refresh rate function of a high refresh rate signal and improving the user experience. Attached Figure Description

[0010] 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.

[0011] Figure 1 This is a schematic diagram illustrating the usage scenarios of the display device in some embodiments of this application; Figure 2 Hardware configuration block diagrams of control devices provided in some embodiments of this application; Figure 3 Hardware configuration block diagrams of display devices provided in some embodiments of this application; Figure 4 This is a schematic diagram of the software configuration in a display device provided in some embodiments of this application; Figure 5 Hardware configuration diagrams of the first controller and the second controller provided for some embodiments of this application; Figure 6 Interaction diagrams of HDMI interfaces provided in some embodiments of this application; Figure 7 Schematic diagram of DLG frequency multiplication function provided in some embodiments of this application; Figure 8 Schematic diagram of HSR frequency multiplication function provided in some embodiments of this application; Figure 9 This is a flowchart illustrating a variable refresh rate signal display method provided in some embodiments of this application; Figure 10 This application provides schematic diagrams of the switching control for a frequency multiplier switch in some embodiments. Figure 11 A flowchart illustrating the detection of target refresh rate provided in some embodiments of this application; Figure 12 A flowchart illustrating the setting of the target screen parameter mode in Scenario 1, provided for some embodiments of this application; Figure 13 This is a schematic diagram of the target screen parameter mode for a constant refresh rate signal in Scenario 1 provided by some embodiments of this application; Figure 14 This is a schematic diagram of the target screen parameter mode of the variable refresh rate signal in Scenario 1 provided by some embodiments of this application; Figure 15 A flowchart illustrating the setting of the target screen parameter mode in Scenario 2 provided in some embodiments of this application; Figure 16 This is a schematic diagram of the target screen parameter mode for a constant refresh rate signal in Scenario 2 provided in some embodiments of this application; Figure 17 This is a schematic diagram of the target screen parameter mode of the variable refresh rate signal in Scenario 2 provided in some embodiments of this application; Figure 18 A flowchart illustrating the setting of the target screen parameter mode in Scenario 3, provided for some embodiments of this application; Figure 19 This is a schematic diagram of the target screen parameter mode for a constant refresh rate signal in Scenario 3, provided in some embodiments of this application; Figure 20 This is a schematic diagram of the target screen parameter mode for a variable refresh rate signal in Scenario 3, provided in some embodiments of this application; Figure 21 This is a flowchart illustrating the process of setting the target screen parameter mode in Scenario 4, which is provided for some embodiments of this application. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the exemplary embodiments of this application clearer, the technical solutions in the exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0013] Based on the exemplary embodiments shown in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Furthermore, although the disclosures in this application are presented by way of one or more exemplary examples, it should be understood that each aspect of these disclosures can constitute a complete technical solution on its own.

[0014] It should be understood that the terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate, for example, to allow implementation in orders other than those given in the embodiments illustrated or described in this application.

[0015] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0016] The display device provided in this application can have various implementation forms, such as a television, a smart television, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 and Figure 3 This is one specific embodiment of the display device of this application.

[0017] Figure 1 This is a schematic diagram illustrating the operational scenario between the display device and the control device according to the embodiment. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100.

[0018] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, and other short-range communication methods, controlling the display device 200 wirelessly or via wired means. Users can control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0019] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may also be used to control the display device 200. For example, an application running on the smart device may be used to control the display device 200.

[0020] In some embodiments, the display device 200 may receive instructions not through the aforementioned smart device or control device, but through touch or gestures.

[0021] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300. For example, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0022] In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactive features to the display device 200. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers.

[0023] Figure 2 An exemplary configuration block diagram of a control device 100 according to an exemplary embodiment is shown. Figure 2 As shown, the control device 100 includes a device controller 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply. The control device 100 can receive user input operation commands and convert the operation commands into commands that the display device 200 can recognize and respond to, thus acting as an intermediary for interaction between the user and the display device 200.

[0024] like Figure 3 As shown, the display device 200 includes at least one of a tuner 210, a communicator 220, a detector 230, a device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a communication device interface 280.

[0025] In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first interface to an nth interface for input / output.

[0026] The display 260 includes a display screen assembly for presenting images, a driving assembly for driving image display, a component for receiving image signals from the controller output, and a user control UI interface for displaying video content, image content, menu control interface, and user control UI interface.

[0027] The display 260 can be an LCD display, an OLED display, or a projection display, and can also be a projection device and a projection screen.

[0028] The communicator 220 is a component used to communicate with external devices or servers according to various communication protocol types. For example, the communicator may include at least one of the following: a Wi-Fi module, a Bluetooth module, a wired Ethernet module, other network communication protocol chips or near-field communication protocol chips, and an infrared receiver. The display device 200 can establish the transmission and reception of control signals and data signals with the control device 100 or the server 400 through the communicator 220.

[0029] The communication device interface 280 can be used to receive control signals from the control device 100 (such as an infrared remote control).

[0030] Detector 230 is used to collect signals from the external environment or to interact with the external environment. For example, detector 230 includes a light receiver, a sensor for collecting ambient light intensity; or, detector 230 includes an image acquisition device, such as a camera, which can be used to collect external environmental scenes, user attributes, or user interaction gestures; or, detector 230 includes a sound acquisition device, such as a microphone, for receiving external sounds.

[0031] Device interface 240 may include, but is not limited to, one or more of the following: High Definition Multimedia Interface (HDMI), analog or high-definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. It may also be a composite input / output interface formed by multiple interfaces mentioned above.

[0032] The tuner / demodulator 210 receives broadcast television signals via wired or wireless means, and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals.

[0033] In some embodiments, the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0034] The controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in the memory. The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command to select a UI object to display on the monitor 260, the controller 250 can execute operations related to the object selected by the user command.

[0035] In some embodiments, the controller 250 includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), a RAM (RandomAccess Memory), a ROM (Read-Only Memory), a first to an nth interface for input / output, a communication bus, etc.

[0036] Users can input commands through a graphical user interface (GUI) displayed on the monitor 260, and the user input interface receives the user input commands through the GUI. Alternatively, users can input commands by entering specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0037] A "user interface" is the medium through which an application or operating system interacts and exchanges information with the user. It converts information from its internal form to a form that the user can accept. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0038] like Figure 4 As shown, in some embodiments, the system is divided into four layers, from top to bottom: the Applications layer (referred to as the "Application Layer"), the Application Framework layer (referred to as the "Framework Layer"), the Android runtime and system library layer (referred to as the "System Runtime Layer"), and the kernel layer.

[0039] In some embodiments, at least one application runs in the application layer. These applications may be Windows programs, system settings programs, or clock programs that come with the operating system; they may also be applications developed by third-party developers. In specific implementations, the application packages in the application layer are not limited to the examples above.

[0040] The framework layer provides application programming interfaces (APIs) and a programming framework for applications. The application framework layer includes predefined functions. It acts as a central processing unit, determining the actions taken by applications within the application layer. Through the API, applications can access system resources and obtain system services during execution.

[0041] like Figure 4 As shown, the application framework layer in this embodiment includes managers, content providers, etc., wherein the managers include at least one of the following modules: ActivityManager, which interacts with all activities running in the system; LocationManager, which provides access to system location services for system services or applications; PackageManager, which retrieves various information related to application packages currently installed on the device; NotificationManager, which controls the display and clearing of notification messages; and WindowManager, which manages icons, windows, toolbars, wallpapers, and desktop widgets on the user interface.

[0042] In some embodiments, the Activity Manager manages the lifecycle of individual applications and common navigation and back functions, such as controlling application exit, opening, and back actions. The Window Manager manages all window programs, such as obtaining the screen size, determining if a status bar is present, locking the screen, capturing the screen, and controlling display window changes (e.g., shrinking the display window, shaking the display, distorting the display, etc.).

[0043] In some embodiments, the system runtime library layer provides support for the upper layer, namely the framework layer. When the framework layer is used, the Android operating system runs the C / C++ libraries contained in the system runtime library layer to implement the functions that the framework layer needs to perform.

[0044] In some embodiments, the kernel layer is a layer between hardware and software. For example... Figure 4 As shown, the kernel layer includes at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, WIFI driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver.

[0045] Based on the hardware and software configuration of the display device 200 described above, in some embodiments, the controller 250 may include a first controller and a second controller. The first controller is used only to control the display process of the display 260, while the second controller is used to handle tasks of various functions in the system, including running UI objects, processing input signals, and performing audio and video decoding, among others. For example, the second controller may be composed of a motherboard including a System on a Chip (SOC), and the first controller may be composed of a logic board (TCON board) including a Timing Controller (TCON) chip.

[0046] In some embodiments, the second controller is the main chip of the display device 200, and the first controller is a sub-chip of the display device 200. They can exist independently on the motherboard and logic board. For example, as... Figure 5 As shown, the second controller is a SOC and the first controller is a TCON; the SOC is located on the motherboard and the TCON is located on the TCON board. Figure 5 In this context, Chip On Film (COF) 2501 is a chip-on-film packaging technology that fixes integrated circuits (ICs) onto flexible circuit boards. TCON can achieve back-end blacking based on COF 2501 to eliminate the Mura (non-uniformity) effect when the display 260 is displayed. The source driver board 2502 is an S-PCB board.

[0047] The TCON includes a timing control circuit 2504 (TCON IC) and a level shifter integrated circuit 2505. The motherboard and the TCON board are connected via a flexible flat cable 2506 (FFC), and the TCON board and the source driver board 2502 are also connected via a flexible flat cable 2506. The flip-chip film 2501 includes a flip-chip film and source driver chips. Each source driver chip is connected to the source driver board 2502 and the display 260 via chip control pins. The chip control pins can be used to drive the gate electrodes, enabling them row by row or column by column, thereby realizing the scanning function of the TCON board.

[0048] In other embodiments, the first controller may be integrated into the second controller. That is, the second controller is a motherboard including a main chip, and the first controller is a sub-chip; the sub-chip is integrated into the motherboard, making it a sub-module within the motherboard. In this case, a circuit board (motherboard) includes at least two chips, namely the aforementioned main chip and sub-chip.

[0049] Of course, regardless of whether the first and second controllers are two independent chips or integrated into one chip, the display device 200 can display the playback image corresponding to the audio and video signals received by the device interface 240 on the monitor 260 through the aforementioned first and second controllers. In this process, the second controller is used to set the screen parameter mode of the display device 200 according to the refresh rate of the audio and video signals and to perform image processing on the audio and video signals. The screen parameter mode is used to set the display parameters of the display device 200, including but not limited to screen parameters such as resolution, the number of horizontal and vertical pixels, and refresh rate. The first controller is used to convert the audio and video signals into drive signals at the corresponding refresh rate according to the screen parameter mode set by the second controller, and then send the drive signals to the monitor 260 so that the monitor 260 displays the playback image of the audio and video signals based on the drive signals. The drive signals are signals suitable for display on the monitor 260; for example, the first controller can convert the received audio and video signals into drive signals in formats such as mini-LVDS or RSDS signals.

[0050] For ease of description, in this embodiment of the application, the audio and video signals received by the device interface 240 for display are referred to as input signals.

[0051] In some embodiments, the display device 200 can connect to other external devices via the device interface 240. The device interface 240 can be an interface such as a USB interface or an HDMI interface, and the external device can be a game console, a PC, or other similar devices. When the display device 200 connects to an external device via the device interface 240, a corresponding signal source channel can be established, and input signals can be received through this signal source channel. For example, the display device 200 can connect to a game console via an HDMI interface to establish an HDMI channel and receive game signals sent by the game console based on this HDMI channel.

[0052] like Figure 6As shown, when device interface 240 is an HDMI interface, in some embodiments, display device 200 connects to other external devices via HDMI input (HDMI in), with display device 200 acting as a sink and the external device acting as a source. When the external device is connected to display device 200, the external device pulls up a 5V voltage through the HDMI interface, allowing the 5V voltage to be simultaneously applied to the HDMI interface of display device 200. For example, when the external device is connected to display device 200 via HDMI, the external device can apply a 5V voltage to display device 200 through pin 18 (PWR_CON_PIN18) of the HDMI interface and read the EDID (Extended Display Identification Data) of display device 200 based on the HDMI interface. The EDID includes information such as the refresh rate supported by display device 200.

[0053] After detecting a stable 5V voltage signal, the display device 200 prepares the HDCP key and EDID file, and pulls the HPD (Hot Plug Detection) signal high. HDCP (High-bandwidth Digital Content Protection) is a content protection technology capable of data encryption and authorization verification; each device has a pre-set key for performing this verification.

[0054] Upon detecting an HPD high signal, the external device performs HDCP verification with the display device 200 and reads the EDID of the display device 200 via the DDC (Display Data Channel) of the HDMI interface. The EDID includes device-related information of the display device 200, such as resolution, refresh rate, and color support. Based on the EDID information, the external device then transmits input signals to the display device 200 via the TMDS (Transition Minimized Differential Signaling) data channel and TMDS clock channel in the HDMI interface, enabling the display device 200 to play or display audio and video data from the external device. The TMDS data channel is used to transmit the RGB data of pixels, and the TMDS clock channel is used to maintain the uniform timing required for transmission.

[0055] In some embodiments, the HDMI interface is also configured with a CEC (Consumer Electronics Control Channel). The display device 200 can report its status to external devices through the CEC, and the CEC supports various commands and functions, such as power on / off control, volume control, input switching, etc.

[0056] In some embodiments, the screen refresh rate supported by the display device 200 is limited by screen performance and driving voltage. For example, in hardware, the TCON of the display device 200 can support a 60Hz output. In this case, the screen refresh rate of the display device 200 is 60Hz, and the TCON can convert the received input signal into a 60Hz driving signal. In some embodiments, when the device interface 240 is connected to an external device, the external device 500 can obtain the refresh rate supported by the display device 200 based on a specific application (such as obtaining EDID), and then send the corresponding input signal to the display device 200 according to the obtained refresh rate.

[0057] For example, the external device 500 can obtain the refresh rate supported by the display device 200 based on the EDID of the display device 200, and then send the corresponding input signal to the display device 200 according to the refresh rate supported by the display device 200. For instance, when the screen refresh rate of the display device 200 is 60Hz, the EDID of the display device 200 includes data information supporting a 60Hz refresh rate, and the external device 500 can send a 60Hz input signal to the display device 200 based on the device interface 240.

[0058] To meet the demands of high refresh rate scenarios such as gaming, esports, and movie watching, in some embodiments, the display device 200 can also be configured with specific software services to improve its supported refresh rate. For example, the display device 200 can be configured with software services featuring HSR and DLG technologies to adjust the way the TCON scans the input signal pixels, thereby achieving a frequency multiplication function and increasing the refresh rate supported by the display device 200.

[0059] In some embodiments, for the DLG frequency multiplication function, when the display device 200 is configured with DLG technology software services, the SOC can send control commands to the TCON based on the DLG technology software services, causing the TCON to simultaneously activate two rows of gates to replace progressive scanning, reducing the time consumed by the display drive signals, thereby improving the refresh rate of the display device 200. For example... Figure 7 As shown, under DLG technology, dual-line scanning is performed, scanning two rows of pixels at a time, with the content of the two rows being identical, i.e., G1=G2. However, this reduces the amount of information in the input signal by half, resulting in a decrease in the clarity of the playback image.

[0060] To reduce the loss of clarity caused by the frequency doubling function, in some embodiments, the difference display is achieved through timing adjustment for the HSR frequency doubling function. For example... Figure 8 As shown, under HSR technology, only the pixels in odd-numbered or even-numbered rows are scanned, while the information from the two adjacent rows is merged in another row. That is, taking the scanning of odd-numbered rows as an example, G1=G1, G2=G1+G3 / 2 (interpolation processing). In this way, the frequency doubling function implemented by HSR technology can improve the resolution of the image due to the reduction in information while increasing the refresh rate.

[0061] Based on the aforementioned frequency multiplication function, the display device 200 can increase its supported refresh rate by reducing the time the TCON scans pixels. For example, a display device that hardware-supports 60Hz can increase its supported refresh rate to 120Hz through the frequency multiplication function. In some embodiments, the device interface 240 can also support input signals with higher refresh rates. In this embodiment, the device interface 240 is described as an HDMI interface, but this is not a limitation. In some embodiments, the HDMI interface can also support input signals with high refresh rates (also known as high frame rates) such as 144Hz.

[0062] To adapt to dynamic display scenarios of the display device 200, in some embodiments, the display device 200 is also equipped with a variable refresh rate function. This function allows external devices to send variable refresh rate signals, such as VRR (Variable Refresh Rate) signals or FreeSync signals, to the display device 200, thereby improving issues like tearing or jitter that occur when the display device 200 displays playback images at a fixed refresh rate. Specifically, VRR and FreeSync technologies dynamically adjust the refresh rate of the display 260 (i.e., TCON) to keep the refresh rate of the drive signal synchronized with the refresh rate of the input signal. In other words, the display device 200 can dynamically adjust the refresh rate of the TCON based on changes in the refresh rate of the input signal, ensuring that the converted drive signal is synchronized with the refresh rate of the input signal.

[0063] However, the variable refresh rate function supports a limited range of refresh rates. When the variable refresh rate function of the display device 200 is enabled, the range of refresh rates that the display device 200 can support is fixed. External devices can only send input signals of refresh rates within this range to the display device 200, and cannot send input signals of higher refresh rates, thus increasing the limitations of the variable refresh rate function. For example, if the monitor 260 supports a refresh rate of 60Hz and the VRR configuration range is 48-60Hz, external devices cannot send VRR signals higher than 60Hz to the display device 200.

[0064] Based on the above application scenarios, some embodiments of this application provide a display device 200, including a display 260, a device interface 240, and a controller 250. The display 260 is configured to display a playback image of an input signal; the device interface 240 is configured to connect to an external device and receive input signals sent by the external device. The input signal can be a constant refresh rate signal or a variable refresh rate signal. A constant refresh rate signal refers to an input signal with a fixed refresh rate, while a variable refresh rate signal refers to an input signal with a dynamically changing refresh rate. For example, a variable refresh rate signal can be a VRR signal or a FreeSync signal.

[0065] like Figure 9 As shown, the controller 250 is configured to perform the following program steps: S9001: In response to a change event of the input signal, detect the target refresh rate of the input signal.

[0066] Display device 200 is connected to external device 500 via HDMI in interface. Display device 200 acts as the receiver and external device 500 acts as the transmitter. Both devices perform [operations / functions]. Figure 6 After the verification shown, the external device 500 sends the corresponding input signal to the display device 200 according to the EDID of the display device 200.

[0067] For example, external device 500 pulls a 5V voltage signal high through pin 18 of its HDMI interface. After detecting a stable 5V voltage, display device 200 prepares its HDCP key and EDID, and pulls the HPD signal high. When external device 500 detects the HPD signal going high, it reads the EDID of display device 200 through the DDC channel (I2C) on pins 15 and 16 of the HDMI interface to determine the resolution, refresh rate, and other functions supported by display device 200. Then, it performs HDCP verification between display device 200 and external device 500 based on the HDMI interface. After successful verification, external device 500 sends its supported input signals to display device 200 through the TDMS data channel and TDMS clock channel, based on the EDID of display device 200.

[0068] In some embodiments, the display device 200 generates an input signal change event when the input signal changes from non-existent to present, or when the signal type of the input signal changes. For example, when the display device 200 is connected to an external device 500 via an HDMI interface, it generates an input signal change event upon receiving an input signal from the external device 500; or, it generates an input signal change event when the signal type of the input signal changes from a constant refresh rate signal to a variable refresh rate signal (VRR signal / FreeSync signal, etc.).

[0069] After detecting a change event in the input signal, the display device 200, in response to the change event, detects the target refresh rate of the input signal. In some embodiments, the target refresh rate includes a first refresh rate, a second refresh rate, a third refresh rate, and a fourth refresh rate. The third refresh rate is greater than the second refresh rate; the second refresh rate is greater than the first refresh rate and is twice the first refresh rate; the fourth refresh rate is not equal to the first, second, and third refresh rates, that is, the fourth refresh rate is a refresh rate other than the first, second, and third refresh rates.

[0070] For ease of explanation, this application embodiment uses a screen refresh rate of 60Hz, a first refresh rate of 60Hz, a second refresh rate of 120Hz, and a third refresh rate of 144Hz supported by the display 260 as examples. However, this is not a limitation, and the above refresh rates can also be other values, such as 120Hz, 240Hz, and 288Hz. Correspondingly, in some embodiments of this application, a variable refresh rate range of 48Hz-144Hz is used as an example for explanation. However, this is not a limitation, and the variable refresh rate range can also be other ranges, such as 48Hz-288Hz.

[0071] For example, within the variable refresh rate range of 48Hz-144Hz, when the first refresh rate is 60Hz, the second refresh rate is 120Hz, and the third refresh rate is 144Hz, the fourth refresh rate is any refresh rate within the range of 48Hz-144Hz other than 60Hz, 120Hz, and 144Hz.

[0072] In some embodiments, the variable refresh rate range in the EDID corresponding to the display device 200 is configured as a target range so that the external device 500 can send appropriate input signals to the display device 200 according to the target range. For example, if the target range in the EDID corresponding to the display device 200 is configured as 48Hz-144Hz, the external device 500 can send a constant refresh rate signal or a variable refresh rate signal within the range of 48Hz-144Hz to the display device 200.

[0073] To accommodate different target refresh rates, in some embodiments, the display device 200 is configured with different screen parameter modes, including a first screen parameter mode, a second screen parameter mode, and a third screen parameter mode. The first screen parameter mode is used to set the first screen parameter, the second screen parameter mode is used to set the second screen parameter, and the third screen parameter mode is used to set the third screen parameter. The first screen parameter is used to display the playback image based on a first refresh rate, the second screen parameter is used to display the playback image based on a second refresh rate, and the third screen parameter is used to display the playback image based on a third refresh rate.

[0074] In other words, the first screen corresponds to the first refresh rate, the second screen corresponds to the second refresh rate, and the third screen corresponds to the third refresh rate. The second screen parameter is also based on the frequency multiplier function, that is, when the display device 200 is in the second screen parameter mode, the display device 200 needs to enable the frequency multiplier function.

[0075] For example, the monitor 260 supports a screen refresh rate of 60Hz, with a first refresh rate of 60Hz, a second refresh rate of 120Hz, and a third refresh rate of 144Hz. The first screen parameter mode is 4K2K@60Hz, the second screen parameter mode is 4K1K@120Hz, and the third screen parameter mode is 4K1K@144Hz. Here, 4K2K and 4K1K represent the number of pixels displayed, and 60Hz, 120Hz, and 144Hz represent the refresh rate.

[0076] In some embodiments, the display device 200 is configured with a frequency multiplier switch that implements a frequency multiplier function. The frequency multiplier switch includes an on state and an off state. The on state of the frequency multiplier switch is used to enable the frequency multiplier function, and the off state of the frequency multiplier switch is used to disable the frequency multiplier function. For example, as... Figure 10 As shown, a setting interface of the display device 200 provides a switch control 101 for a frequency multiplier switch. The user can click on the switch control 101 to make the frequency multiplier switch generate an on or off command based on the current attribute value of the switch control 101, and set the frequency multiplier switch to the on or off state in response to the on or off command.

[0077] In some embodiments, when the frequency multiplier switch is in the ON state, the display device 200 forcibly sets the screen parameter mode to the second screen parameter mode. Correspondingly, when the screen parameter mode is set to the second screen parameter mode, the display device 200 forcibly sets the frequency multiplier switch to the ON state.

[0078] To accommodate both variable refresh rate and constant refresh rate signals, in some embodiments, the target refresh rate detected by the display device 200 can be either the fixed refresh rate of a constant refresh rate signal or the base refresh rate of a variable refresh rate signal (such as a VRR signal). The fixed refresh rate refers to the fixed refresh rate of the external device 500 when it receives the input signal, or it can be referred to as a fixed frame rate. The base refresh rate refers to the lowest refresh rate supported by the variable refresh rate signal, and the variable refresh rate model can dynamically change between the base refresh rate and the highest refresh rate.

[0079] like Figure 11As shown, in some embodiments, when the display device 200 detects the target refresh rate of the input signal, it receives an extended metadata packet sent by the external device 500 (S1101). The extended metadata packet (EMP) is sent synchronously with the input signal and can be transmitted via the TMDS channel of the HDMI interface. The signal type identifier in the extended metadata is then parsed (S1102). If the signal type identifier is a preset identifier, the base refresh rate is read from the target byte of the extended metadata packet to obtain the target refresh rate (S1103). The preset identifier indicates that the input signal is a variable refresh rate signal. Conversely, if the signal type identifier is not a preset identifier, the display device 200 calculates the fixed refresh rate when the external device 500 sends the input signal to obtain the target refresh rate (S1104).

[0080] That is, when the input signal is a constant refresh rate signal, the fixed refresh rate when the external device 500 sends the input signal is used as the target refresh rate; when the input signal is a variable refresh rate signal, the base refresh rate in the variable refresh rate signal is used as the target refresh rate.

[0081] For example, as shown in the table below, the extended meta-data packet (EMP) information of the input signal is as follows. In the EMP, bit 0 in MD0 is used to store the signal type identifier. The preset identifier corresponding to the variable refresh rate signal can be VRR_EN. After the display device 200 detects the VRR_EN identifier, it reads the Base_Refresh_Reate bytes in MD2 and MD3 of the extended meta-data packet to obtain the base refresh rate of the variable refresh rate signal, which is "Base_Refresh_Reate[9:0]" and "Base_Refresh_Reate[7:0]" shown in the table.

[0082]

[0083] It is understood that the bits and characters stored in the extended metadata packet described above are merely illustrative and not unique. The display device 200 may also use other bits or characters to characterize the signal type of the input signal and the base refresh rate of the variable refresh rate signal. This application does not impose any limitations on this.

[0084] S9002: Get the current screen parameter mode of the display device.

[0085] After detecting the base refresh rate of the constant refresh rate signal or the variable refresh rate signal, the display device 200 obtains the current screen parameter mode of the display device 200, which is the screen parameter mode currently set by the display device 200. This can be one of the first, second, and third screen parameter modes mentioned above. For example, if the currently set screen parameter mode is 4K2K@60Hz mode, the display device 200 uses the screen parameters corresponding to 60Hz, and the obtained current screen parameter mode is 4K2K@60Hz mode.

[0086] For example, the display device 200 can obtain the current screen parameter mode in different ways. For instance, the display device 200 can read the screen parameter mode stored in internal registers or status variables to obtain the current screen parameter mode; or, the display device 200 can query the status of the image processor or TCON based on a specific software program to obtain the current screen parameter mode; or, the display device 200 can call the services or APIs provided by the operating system or firmware to obtain the current screen parameter mode; or, the display device 200 can retrieve the current screen parameter mode from a database or configuration file.

[0087] In some embodiments, after setting the corresponding screen parameter mode, the display device 200 also writes the set screen parameter mode into a database. When the display device 200 is powered off and then powered on again, it can read the written screen parameter mode from the database and set the screen parameter mode of the display device 200 according to the read screen parameter mode, thereby remembering the user operation and improving the user's interactive experience.

[0088] S9003: Set the screen parameter mode to the target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode.

[0089] After detecting the current screen parameter mode, the display device 200 sets the screen parameter mode to a target screen parameter mode based on the target refresh rate and the current screen parameter mode, so that the display device 200 can display the playback screen of the input signal according to the display parameters corresponding to the target screen parameter mode. In some embodiments, the target screen parameter mode can be one of a first screen parameter mode, a second screen parameter mode, and a third screen parameter mode.

[0090] For example, if the current screen parameter mode is 4K1K@120Hz, the input signal is a variable refresh rate signal, and the base refresh rate of the variable refresh rate signal is 60Hz, then the display device 200 sets the screen parameter mode based on the 4K1K@120Hz mode and the target refresh rate of 60Hz. As another example, if the current screen parameter mode is 4K1K@120Hz, the input signal is a constant refresh rate signal, and the fixed refresh rate of the constant refresh rate signal is 60Hz, then the display device 200 also sets the screen parameter mode based on the 4K1K@120Hz mode and the target refresh rate of 60Hz.

[0091] The following examples illustrate the process of setting the target screen parameter mode for different scenarios.

[0092] Scenario 1: The target refresh rate of the input signal is the first refresh rate. like Figure 12 As shown, in some embodiments, if the current screen parameter mode is the first screen parameter mode, the display device 200 maintains the first screen parameter mode (S1201). For example, as Figure 13 As shown, the input signal sent by the external device 500 is a constant refresh rate signal. The display device 200 detects that the fixed refresh rate of the constant refresh rate signal is 60Hz and the current screen parameter mode is 4K2K@60Hz. Therefore, the display device 200 maintains the current screen parameter mode unchanged. For example, as... Figure 14 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 60Hz and the current screen parameter mode is 4K2K@60Hz mode. The display device 200 then maintains the current screen parameter mode unchanged.

[0093] If the current screen parameter mode is the second screen parameter mode, the display device 200 turns off the second screen parameter mode (S1202), sets the screen parameter mode to the first screen parameter mode (S1203), and sets the frequency multiplier switch to the off state (S1204). For example, such as Figure 13 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 60Hz and the current screen parameter mode is 4K1K@120Hz mode. The display device 200 then turns off the 4K1K@120Hz mode and switches to the 4K2K@60Hz mode. Then, under the display parameters of the 4K2K@60Hz mode, the frequency multiplier switch (such as the HSR switch) is turned off.

[0094] If the current screen parameter mode is the third screen parameter mode, the display device 200 disables the third screen parameter mode (S1205) and sets the screen parameter mode to the first screen parameter mode (S1206). For example, as Figure 13As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 60Hz and the current screen parameter mode is 4K1K@144Hz mode. The display device 200 then turns off the 4K1K@144Hz mode and switches to the 4K2K@60Hz mode.

[0095] It is understandable that, in the embodiments corresponding to the above scenario one, when the current screen parameter mode is the second screen parameter mode or the third screen parameter mode, the process of setting the target screen parameter mode when the input signal is a constant refresh rate signal is as follows: Figure 13 As shown, its corresponding switching logic is the same as that of the variable refresh rate signal, and will not be elaborated here.

[0096] Scenario 2: The target refresh rate of the input signal is the second refresh rate. like Figure 15 As shown, in some embodiments, if the current screen parameter mode is the first screen parameter mode, the frequency multiplier switch is set to the on state (S1301), and the screen parameter mode is set to the second screen parameter mode (S1302). For example, as Figure 17 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 120Hz and the current screen parameter mode is 4K2K@60Hz mode. The display device 200 then turns on the frequency multiplication switch and sets the screen parameter mode to 4K1K@120Hz mode.

[0097] If the current screen parameter mode is the second screen parameter mode, the display device 200 maintains the second screen parameter mode (S1303). For example, Figure 17 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 120Hz and the current screen parameter mode is 4K1K@120Hz mode. The display device 200 maintains the 4K1K@120Hz mode unchanged.

[0098] If the current screen parameter mode is the third screen parameter mode, disable the third screen parameter mode (S1304), set the frequency multiplier switch to the on state (S1306), and set the screen parameter mode to the second screen parameter mode (S1307). For example, Figure 17 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 120Hz and the current screen parameter mode is 4K1K@144Hz mode. The display device 200 then turns on the frequency multiplication switch and sets the screen parameter mode to 4K1K@120Hz mode.

[0099] In some embodiments, after executing step S1304, the display device 200 further sets the screen parameter mode to a first screen parameter mode (S1305) to enable the frequency multiplier switch in the first screen parameter mode. That is, it executes in the first screen parameter mode. Figure 15 Step S1306 in the process is used to adapt to some display devices 200 that cannot directly switch screen parameter modes, thereby improving the reliability of screen parameter mode settings.

[0100] It is understandable that, in the embodiments corresponding to Scenario 2 above, the process of setting the target screen parameter mode when the input signal is a constant refresh rate signal is as follows: Figure 16 As shown, its corresponding switching logic is the same as that of the variable refresh rate signal, and will not be elaborated here.

[0101] Scenario 3: The target refresh rate of the input signal is the third refresh rate. like Figure 18 As shown, in some embodiments, if the current screen parameter mode is the first screen parameter mode, the display device 200 sets the screen parameter mode to the third screen parameter mode (S1401). For example, as Figure 20 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 144Hz and the current screen parameter mode is 4K2K@60Hz mode. The display device 200 then sets the screen parameter mode to 4K1K@144Hz mode.

[0102] If the current screen parameter mode is the second screen parameter mode, the display device 200 turns off the second screen parameter mode (S1402), sets the frequency multiplier switch to the off state (S1404), and sets the screen parameter mode to the third screen parameter mode (S1405). For example, as Figure 20 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 144Hz and the current screen parameter mode is 4K1K@120Hz mode. The display device 200 then turns off the frequency multiplier switch and sets the screen parameter mode to 4K1K@144Hz mode.

[0103] In some embodiments, after executing step S1402, the display device 200 further sets the screen parameter mode to a first screen parameter mode (S1403), and then sets the frequency multiplier switch to the off state in the first screen parameter mode. That is, it executes in the first screen parameter mode. Figure 18Step S1404. For example, if the display device 200 detects that the base refresh rate of the variable refresh rate signal is 144Hz and the current screen parameter mode is 4K1K@120Hz mode, the display device 200 will set the screen parameter mode to 4K2K@60Hz mode, turn off the frequency multiplier switch in 4K2K@60Hz mode, and then set the screen parameter mode to 4K1K@144Hz mode.

[0104] If the current screen parameter mode is the third screen parameter mode, the display device 200 will maintain the third screen parameter mode (S1406). For example, Figure 20 As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the base refresh rate of the variable refresh rate signal is 144Hz and the current screen parameter mode is 4K2K@144Hz mode. The display device 200 then maintains the 4K1K@144Hz mode unchanged.

[0105] It is understandable that, in the embodiments corresponding to scenario three above, the process of setting the target screen parameter mode when the input signal is a constant refresh rate signal is as follows: Figure 19 As shown, its corresponding switching logic is the same as that of the variable refresh rate signal, and will not be elaborated here.

[0106] Scenario 4: The target refresh rate of the input signal is the fourth refresh rate. like Figure 21 As shown, in some embodiments, if the current screen parameter mode is the first screen parameter mode, the display device 200 maintains the first screen parameter mode (S1501). For example, if the input signal sent by the external device 500 is a variable refresh rate signal, and the display device 200 detects that the base refresh rate of the variable refresh rate signal is 50Hz and the current screen parameter mode is 4K2K@60Hz mode, the display device 200 maintains the 4K2K@60Hz mode unchanged.

[0107] If the current screen parameter mode is the second screen parameter mode, the display device 200 maintains the second screen parameter mode (S1502). For example, if the input signal sent by the external device 500 is a variable refresh rate signal, and the display device 200 detects that the base refresh rate of the variable refresh rate signal is 50Hz and the current screen parameter mode is 4K1K@120Hz mode, the display device 200 will maintain the 4K1K@120Hz mode unchanged.

[0108] Clearly, when the base refresh rate of the input signal is 50Hz, the display device 200 can display the input signal normally regardless of whether the screen parameter mode is the first screen parameter mode or the second screen parameter mode. Therefore, the display device 200 can maintain the currently set screen parameter mode to adapt to the user's operating habits. For example, when the screen parameter mode is the second screen parameter mode, the frequency multiplier function is enabled, indicating that the user previously selected to use the frequency multiplier function, so the second screen parameter mode is maintained at this time, keeping the frequency multiplier function enabled.

[0109] If the current screen parameter mode is the third screen parameter mode, the third screen parameter mode is turned off (S1503), and the screen parameter mode is set to the first screen parameter mode (S1504). For example, if the input signal sent by the external device 500 is a variable refresh rate signal, and the display device 200 detects that the base refresh rate of the variable refresh rate signal is 50Hz and the current screen parameter mode is 4K1K@144Hz mode, since the 4K1K@144Hz mode cannot display a 50Hz playback screen normally, the display device 200 sets the screen parameter mode to 4K2K@60Hz mode.

[0110] It is understood that in the embodiments corresponding to Scenario 4 above, the switching logic of the process of setting the target screen parameter mode when the input signal is a constant refresh rate signal is the same as the switching logic of a variable refresh rate signal, and will not be elaborated here.

[0111] S9004: Control the display to display the playback screen of the input signal according to the target screen parameter mode.

[0112] Based on the target refresh rate and the current screen parameter mode, the display device 200 sets the screen parameter mode to the target screen parameter mode. This allows it to control the monitor 260 to display the playback image corresponding to the input signal according to the display parameters corresponding to the target screen parameter mode. For example, the SOC processes the input signal according to the target screen parameter mode, while the TCON converts the input signal into the corresponding drive signal according to the target screen parameter mode. The refresh rate of the drive signal is consistent with that of the input signal. In some embodiments, the display device 200 includes a first controller and a second controller. The second controller is configured to: set a screen parameter mode to a target screen parameter mode, and send a refresh rate setting command corresponding to the target screen parameter mode to the first controller. The first controller is configured to, in response to the refresh rate setting command, convert the input signal into a drive signal according to the target screen parameter mode, and send the drive signal to the display 260, so that the display 260 displays the playback image of the input signal based on the drive signal.

[0113] For example, the first controller is TCON, and the second controller is SOC. When the display device 200 switches from 4K1K@144Hz mode to 4K2K@60Hz mode, the SOC sets the screen parameter mode to 4K2K@60Hz mode and simultaneously sends a 60Hz setting command to TCON. TCON then responds to the 60Hz setting command and converts the input signal into the corresponding drive signal according to the 4K2K@60Hz mode. It is worth noting that in this embodiment, the refresh rate of the drive signal converted according to the target screen parameter mode is consistent with the refresh rate of the input signal.

[0114] Based on the aforementioned display device 200, some embodiments of this application also provide a method for displaying a variable refresh rate signal, which can be applied to the display device 200 provided in the above embodiments. The display device 200 includes a display 260, a device interface 240, and a controller 250. The display 260 is configured to display a playback screen of an input signal, and the device interface 240 is configured to connect to an external device and receive input signals sent by the external device, wherein the input signal is a constant refresh rate signal or a variable refresh rate signal. Figure 9 As shown, the method includes the following steps: S9001: In response to a change event of the input signal, detect the target refresh rate of the input signal, wherein the target refresh rate is a fixed refresh rate of the constant refresh rate signal or a base refresh rate of the variable refresh rate signal; S9002: Obtain the current screen parameter mode of the display device; S9003: Set the screen parameter mode to the target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode; S9004: Control the display to display the playback screen of the input signal according to the target screen parameter mode.

[0115] As can be seen from the above technical solutions, the display device and variable refresh rate signal display method provided in some embodiments of this application can detect the target refresh rate of the input signal in response to a change event of the input signal. The input signal is a signal sent by an external device, and the target refresh rate can be a fixed refresh rate of a constant refresh rate signal or a base refresh rate of a variable refresh rate signal. The current screen parameter mode of the display device 200 is then obtained, and the screen parameter mode is set to the target screen parameter mode based on the target refresh rate and the current screen parameter mode. The display is then controlled to display the playback screen of the input signal according to the target screen parameter mode. This method sets different screen parameter modes by using a fixed refresh rate or a base refresh rate of the input signal, allowing the display device 200 to display the playback screen of the input signal according to the corresponding screen parameters, thereby realizing the variable refresh rate function of a high refresh rate signal and improving the user experience.

[0116] The same or similar parts among the various embodiments in this specification can be referred to mutually, and will not be repeated here.

[0117] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or certain parts of the embodiments of the present invention.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0119] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that, include: The monitor is configured to display the playback screen of the input signal; The device interface is configured to connect to an external device and receive input signals sent by the external device, the input signals being a constant refresh rate signal or a variable refresh rate signal; The controller is configured as follows: In response to a change event of the input signal, a target refresh rate of the input signal is detected, wherein the target refresh rate is a fixed refresh rate of the constant refresh rate signal or a base refresh rate of the variable refresh rate signal; Get the current screen mode of the display device; The screen parameter modes include a first screen parameter mode, a second screen parameter mode, and a third screen parameter mode. The first screen parameter mode is used to set the first screen parameter to display the playback screen based on a first refresh rate. The second screen parameter mode is used to set the second screen parameter to display the playback screen based on a second refresh rate. The third screen parameter mode is used to set the third screen parameter to display the playback screen based on a third refresh rate. The third refresh rate is greater than the second refresh rate, the second refresh rate is greater than the first refresh rate, and the second screen parameter mode is implemented based on the frequency multiplication function; Based on the target refresh rate and the current screen parameter mode, set the screen parameter mode to the target screen parameter mode; Control the display to show the playback screen of the input signal according to the target screen parameter mode; Wherein, when the target refresh rate is the second refresh rate and the current screen parameter mode is the third screen parameter mode, the controller executes the setting of the screen parameter mode to the target screen parameter mode, and is configured as follows: Turn off the third screen parameter mode, set the screen parameter mode to the first screen parameter mode, set the frequency multiplier switch to the on state in the first screen parameter mode, and then set the screen parameter mode to the second screen parameter mode. When the target refresh rate is the third refresh rate and the current screen parameter mode is the second screen parameter mode, the controller executes the setting of the screen parameter mode to the target screen parameter mode, which is configured as follows: Turn off the second screen parameter mode, set the screen parameter mode to the first screen parameter mode, set the frequency multiplier switch to the off state in the first screen parameter mode, and then set the screen parameter mode to the third screen parameter mode.

2. The display device according to claim 1, characterized in that, The controller is configured to detect the target refresh rate of the input signal as follows: Receive extended metadata data sent by the external device; Parse the signal type identifier in the extended metadata; If the signal type identifier is a preset identifier, the base refresh rate is read from the target byte of the extended metadata to obtain the target refresh rate. The preset identifier is used to characterize the input signal as the variable refresh rate signal. If the signal type identifier is not the preset identifier, calculate the fixed refresh rate when the external device sends the input signal to obtain the target refresh rate.

3. The display device according to claim 1, characterized in that, The controller is also configured to: When the screen parameter mode is set to the second screen parameter mode, the frequency multiplier switch is forcibly set to the on state; When the screen parameter mode is set to the first screen parameter mode or the third screen parameter mode, the frequency multiplier switch is forcibly set to the off state.

4. The display device according to claim 1, characterized in that, The target refresh rate also includes a fourth refresh rate, which is not equal to the first refresh rate, the second refresh rate, and the third refresh rate; The controller executes the setting of the screen parameter mode to the target screen parameter mode, and is configured as follows: If the current screen parameter mode is the first screen parameter mode or the second screen parameter mode, the current screen parameter mode remains unchanged; If the current screen parameter mode is the third screen parameter mode, turn off the third screen parameter mode and set the screen parameter mode to the first screen parameter mode.

5. The display device according to claim 1, characterized in that, The controller is also configured to: After setting the target screen parameter mode based on the base refresh rate of the variable refresh rate signal, when the actual refresh rate of the variable refresh rate signal dynamically changes between the base refresh rate and the maximum refresh rate, the set target screen parameter mode remains unchanged, and the display dynamically adjusts the refresh rate to synchronize with the input signal.

6. The display device according to claim 1, characterized in that, The controller is also configured to: During the handshake phase between the device interface and the external device, the variable refresh rate range in the extended display identification data is configured as a target range, which includes the first refresh rate, the second refresh rate, and the third refresh rate. After the external device reads the extended display recognition data, it sends the input signal according to the target range.

7. The display device according to claim 1, characterized in that, The input signal change events include: the input signal changing from non-existent to present, the input signal type changing between a constant refresh rate signal and a variable refresh rate signal, and the target refresh rate of the input signal changing.

8. The display device according to claim 1, characterized in that, The controller includes a first controller and a second controller; The second controller is configured to: set the screen parameter mode to the target screen parameter mode, and send a refresh rate setting command corresponding to the target screen parameter mode to the first controller; The first controller is configured to: in response to the refresh rate setting instruction, convert the input signal into a drive signal according to the target screen parameter mode, and send the drive signal to the display, so that the display displays the playback screen of the input signal based on the drive signal.

9. The display device according to claim 1, characterized in that, The first screen parameter mode uses a full-resolution progressive scan method; the second screen parameter mode uses a half-resolution dual-line scan or interlaced scan method; the third screen parameter mode uses a half-resolution high refresh rate scan method and does not rely on the frequency multiplier function.

10. A method for displaying a variable refresh rate signal, characterized in that, The method is applied to a display device, which includes a display, a device interface, and a controller. The display is configured to display a playback image of an input signal, and the device interface is configured to connect to an external device and receive an input signal sent by the external device, wherein the input signal is a constant refresh rate signal or a variable refresh rate signal. In response to a change event of the input signal, a target refresh rate of the input signal is detected, wherein the target refresh rate is a fixed refresh rate of the constant refresh rate signal or a base refresh rate of the variable refresh rate signal; Obtain the current screen parameter mode of the display device; the screen parameter mode includes a first screen parameter mode, a second screen parameter mode, and a third screen parameter mode, wherein the first screen parameter mode is used to set a first screen parameter to display the playback image based on a first refresh rate, the second screen parameter mode is used to set a second screen parameter to display the playback image based on a second refresh rate, and the third screen parameter mode is used to set a third screen parameter to display the playback image based on a third refresh rate; the third refresh rate is greater than the second refresh rate, the second refresh rate is greater than the first refresh rate, and the second screen parameter mode is implemented based on a frequency multiplication function; Based on the target refresh rate and the current screen parameter mode, set the screen parameter mode to the target screen parameter mode; Control the display to show the playback screen of the input signal according to the target screen parameter mode; Wherein, when the target refresh rate is the second refresh rate and the current screen parameter mode is the third screen parameter mode, the step of setting the screen parameter mode to the target screen parameter mode includes: Turn off the third screen parameter mode, set the screen parameter mode to the first screen parameter mode, set the frequency multiplier switch to the on state in the first screen parameter mode, and then set the screen parameter mode to the second screen parameter mode. When the target refresh rate is the third refresh rate and the current screen parameter mode is the second screen parameter mode, the step of setting the screen parameter mode to the target screen parameter mode includes: Turn off the second screen parameter mode, set the screen parameter mode to the first screen parameter mode, set the frequency multiplier switch to the off state in the first screen parameter mode, and then set the screen parameter mode to the third screen parameter mode.

Images