Display device and display method of variable refresh rate signal

Abstract

Some embodiments of the present application provide a display device and a variable refresh rate signal display method that can detect a target refresh rate of an input signal in response to a change event of the input signal. Wherein the input signal is a signal sent by external equipment, and the target refresh rate can be a fixed refresh rate of a constant refresh rate signal or a basic refresh rate of a variable refresh rate signal. And acquiring a current screen parameter mode of the display equipment, setting the screen parameter mode as a target screen parameter mode based on the target refresh rate and the current screen parameter mode, and then controlling the display to display a playing picture of the input signal according to the target screen parameter mode. According to the method, different screen parameter modes are set according to the fixed refresh rate or the basic refresh rate of the input signal, so that the display equipment can display the playing picture of the input signal according to the corresponding screen parameters, and the variable refresh rate function of the high refresh rate signal is realized.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display device and a display method of a variable refresh rate signal. Background Art

[0002] Display devices are intelligent devices that can present user interfaces and support user interaction. Taking smart TV as an example, smart TV is based on Internet application technology, has an open operating system and chip, has an open application platform, can realize two-way human-computer interaction, and integrates multiple functions such as audio and video, entertainment, and data to meet the diverse and personalized needs of users.

[0003] The display device may be provided with a device interface, and data interaction with the external device can be realized by connecting the external device through the device interface. For example, the display device can be connected to an external device such as a game console through a High Definition Multimedia Interface (HDMI), receive the input signal provided by the external device through the HDMI interface, and display the playback picture corresponding to the input signal on the display. In order to improve the problem of tearing and jittering of the playback picture, the display device is also equipped with a variable refresh rate function, which enables the display of the display device to adjust the refresh rate in real time, ensuring that the playback picture can be displayed smoothly.

[0004] However, due to the limitations of hardware performance such as liquid crystal performance and driving voltage, the refresh rate that the display in the display device can support is limited, and the frequency range configured by the variable refresh rate function is also limited to the range of the refresh rate that the display can support. For example, if the display in the display device is a 60Hz screen, the variable refresh rate configuration range can be between 48-60HZ. In this way, when the refresh rate of the input signal is greater than the refresh rate supported by the display, the display device cannot display the playback screen of the input signal, which increases the limitations of the variable refresh rate function and affects the user experience. Summary of the invention

[0005] The present application provides a display device and a display method of a variable refresh rate signal to solve the problem of high limitations of the variable refresh rate function in the display device.

[0006] In a first aspect, some embodiments of the present application provide a display device, including a display, a device interface, and a controller. The display is configured to display a playback screen of an input signal, the device interface is configured to connect 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; and the controller is configured to:

[0007] In response to a change event of the input signal, detecting a target refresh rate of the input signal, the target refresh rate being a fixed refresh rate of the constant refresh rate signal or a base refresh rate of the variable refresh rate signal;

[0008] Get the current screen parameter mode of the display device;

[0009] Setting the screen parameter mode to a target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode;

[0010] Control the display to display the playback picture of the input signal according to the target screen parameter mode.

[0011] In a second aspect, some embodiments of the present application provide a display method of a variable refresh rate signal, which is applied to a display device, wherein the display device includes a display, a device interface, and a controller, wherein the display is configured to display a playback screen of an input signal, and the device interface is configured to connect 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 method includes:

[0012] In response to a change event of the input signal, detecting a target refresh rate of the input signal, the target refresh rate being a fixed refresh rate of the constant refresh rate signal or a base refresh rate of the variable refresh rate signal;

[0013] Get the current screen parameter mode of the display device;

[0014] Setting the screen parameter mode to a target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode;

[0015] Control the display to display the playback picture of the input signal according to the target screen parameter mode.

[0016] It can be seen from the above technical solutions that some embodiments of the present application provide a display device and a display method for a variable refresh rate signal, and the method can detect the target refresh rate of the input signal in response to a change event of the input signal. Among them, 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 basic refresh rate of a variable refresh rate signal. Then, the current screen parameter mode of the display device is 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, and then the display is controlled to display the playback screen of the input signal according to the target screen parameter mode. The method sets different screen parameter modes by the fixed refresh rate or basic refresh rate of the input signal, so that the display device can display the playback screen of the input signal according to the corresponding screen parameters, thereby realizing the variable refresh rate function of the high refresh rate signal and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram showing usage scenarios of a display device in some embodiments of the present application;

[0019] Figure 2 A hardware configuration block diagram of a control device provided in some embodiments of the present application;

[0020] Figure 3 A hardware configuration block diagram of a display device provided in some embodiments of the present application;

[0021] Figure 4 A schematic diagram of software configuration in a display device provided in some embodiments of the present application;

[0022] Figure 5 A hardware configuration diagram of a first controller and a second controller provided in some embodiments of the present application;

[0023] Figure 6 An interactive diagram of an HDMI interface provided for some embodiments of the present application;

[0024] Figure 7 A schematic diagram of the DLG frequency doubling function provided in some embodiments of the present application;

[0025] Figure 8 A schematic diagram of the HSR frequency doubling function provided in some embodiments of the present application;

[0026] Fig. 9 A schematic flow chart of a variable refresh rate signal display method provided in some embodiments of the present application;

[0027] Fig.10 A schematic diagram of a switch control of a frequency multiplier switch provided in some embodiments of the present application;

[0028] Fig.11 A schematic diagram of a process for detecting a target refresh rate provided in some embodiments of the present application;

[0029] Fig.12a A schematic diagram of a process for setting a target screen parameter mode in scenario 1 provided in some embodiments of the present application;

[0030] Figure 12bA schematic diagram of a target screen parameter mode of a constant refresh rate signal in scenario 1 provided in some embodiments of the present application;

[0031] Fig.12c A schematic diagram of a target screen parameter mode of a variable refresh rate signal in scenario 1 provided in some embodiments of the present application;

[0032] Fig.13a A schematic diagram of a process for setting a target screen parameter mode in scenario 2 provided in some embodiments of the present application;

[0033] Fig.13b A schematic diagram of a target screen parameter mode of a constant refresh rate signal in scenario 2 provided in some embodiments of the present application;

[0034] Fig.13c A schematic diagram of a target screen parameter mode of a variable refresh rate signal in scenario 2 provided in some embodiments of the present application;

[0035] Fig.14a A schematic diagram of a process for setting a target screen parameter mode in scenario three provided in some embodiments of the present application;

[0036] Fig.14b A schematic diagram of a target screen parameter mode of a constant refresh rate signal in scenario three provided in some embodiments of the present application;

[0037] Fig.14c A schematic diagram of a target screen parameter mode of a variable refresh rate signal in scenario three provided in some embodiments of the present application;

[0038] Fig.15 A flowchart of setting the target screen parameter mode in scenario 4 provided in some embodiments of the present application. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the exemplary embodiments of the present application clearer, the technical solutions in the exemplary embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0040] Based on the exemplary embodiments shown in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In addition, although the disclosure in this application is introduced according to one or several exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete technical solution separately.

[0041] It should be understood that the terms "first", "second", "third", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, for example, they can be implemented according to an order other than those given in the diagrams or descriptions of the embodiments of this application.

[0042] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0043] The display device provided in the embodiments of the present application may have various implementation forms, for example, it may be a television, a smart television, a laser projection device, a monitor, an electronic whiteboard (electronic bulletin board), an electronic table (electronic table), etc. Figure 1 and Figure 3 This is a specific implementation of the display device of the present application.

[0044] Figure 1 FIG. 1 is a schematic diagram of an operation scenario between a display device and a control device according to an embodiment. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100 .

[0045] In some embodiments, the control device 100 may be a remote controller, and the communication between the remote controller and the display device includes infrared protocol communication or Bluetooth protocol communication, and other short-range communication methods, and the display device 200 is controlled wirelessly or wired. The user may control the display device 200 by inputting user commands through buttons on the remote controller, voice input, control panel input, etc.

[0046] In some embodiments, a smart device 300 (such as a mobile terminal, a tablet computer, a computer, a laptop computer, etc.) may also be used to control the display device 200. For example, the display device 200 is controlled using an application running on the smart device.

[0047] In some embodiments, the display device 200 may not use the above-mentioned smart device or control device to receive instructions, but may receive user control through touch or gestures.

[0048] In some embodiments, the display device 200 can also be controlled in a manner other than the control device 100 and the smart device 300. For example, the user's voice command control can be directly received through a module for obtaining voice commands configured inside the display device 200, or the user's voice command control can be received through a voice control device set outside the display device 200.

[0049] In some embodiments, the display device 200 also communicates data with the server 400. The display device 200 may be allowed to communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactions to the display device 200. The server 400 may be one cluster or multiple clusters, and may include one or more types of servers.

[0050] Figure 2 Schematically shows a configuration block diagram of the control device 100 according to an exemplary embodiment. 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 input operation instructions from the user, and convert the operation instructions into instructions that the display device 200 can recognize and respond to, playing the role of an interactive intermediary between the user and the display device 200.

[0051] like Figure 3 As shown, the display device 200 includes at least one of a tuner and demodulator 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 .

[0052] In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, a RAM, a ROM, and a first interface to an nth interface for input / output.

[0053] The display 260 includes a display screen component for presenting images, and a driving component for driving image display, which is used to receive image signals output from the controller, and display video content, image content, and menu control interface components and user control UI interface.

[0054] The display 260 may be a liquid crystal display, an OLED display, or a projection display, and may also be a projection device and a projection screen.

[0055] The communicator 220 is a component for communicating with an external device or server according to various communication protocol types. For example, the communicator may include at least one of a Wifi module, a Bluetooth module, a wired Ethernet module, and other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The display device 200 may establish transmission and reception of control signals and data signals with the control device 100 or the server 400 through the communicator 220.

[0056] The communication device interface 280 may be used to receive a control signal from the control device 100 (eg, an infrared remote controller, etc.).

[0057] The detector 230 is used to collect signals from the external environment or the external interaction. For example, the detector 230 includes a light receiver, a sensor for collecting the intensity of ambient light; or, the detector 230 includes an image collector, such as a camera, which can be used to collect external environment scenes, user attributes or user interaction gestures; or, the detector 230 includes a sound collector, such as a microphone, etc., for receiving external sounds.

[0058] The device interface 240 may include, but is not limited to, any one or more of the following interfaces: a high-definition multimedia interface (HDMI), an analog or digital high-definition component input interface (component), a composite video input interface (CVBS), a USB input interface (USB), an RGB port, etc. It may also be a composite input / output interface formed by the above multiple interfaces.

[0059] The tuner-demodulator 210 receives broadcast television signals via wired or wireless reception, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

[0060] In some embodiments, the controller 250 and the tuner-demodulator 210 may be located in different separate devices, that is, the tuner-demodulator 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.

[0061] 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 for selecting a UI object to be displayed on the display 260, the controller 250 can perform operations related to the object selected by the user command.

[0062] 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 (Random Access Memory, RAM), a ROM (Read-Only Memory, ROM), a first interface to an nth interface for input / output, a communication bus (Bus), etc.

[0063] The user may input a user command through a graphical user interface (GUI) displayed on the display 260, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user may input a user command through a specific sound or gesture, and the user input interface recognizes the sound or gesture through a sensor to receive the user input command.

[0064] "User interface" is the medium interface for interaction and information exchange between applications or operating systems and users. It realizes the conversion between the internal form of information and the form acceptable to users. The commonly used form of user interface is the Graphical User Interface (GUI), which refers to the user interface related to computer operation displayed in a graphical way. It can be an interface element such as an icon, window, control, etc. displayed on the display screen of an electronic device, where the control can include icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, widgets, etc.

[0065] like Figure 4 As shown, in some embodiments, the system is divided into four layers, from top to bottom, namely, the application layer (Application s) layer (referred to as "application layer"), the application framework layer (Application Framework) layer (referred to as "framework layer"), the Android runtime (Android runtime) and system library layer (referred to as "system runtime library layer"), and the kernel layer.

[0066] In some embodiments, at least one application is running in the application layer, and these applications can be window programs, system settings programs, clock programs, etc. provided by the operating system, or applications developed by third-party developers. In specific implementations, the application packages in the application layer are not limited to the above examples.

[0067] The framework layer provides application programming interfaces (APIs) and programming frameworks for applications. The application framework layer includes some predefined functions. The application framework layer is equivalent to a processing center that determines the actions that applications in the application layer take. Through the API interface, applications can access system resources and obtain system services during execution.

[0068] like Figure 4 As shown, in the embodiment of the present application, the application framework layer includes managers, content providers, etc., wherein the manager includes at least one of the following modules: an activity manager is used to interact with all activities running in the system; a location manager is used to provide system services or applications with access to system location services; a package manager is used to retrieve various information related to the application packages currently installed on the device; a notification manager is used to control the display and clearing of notification messages; a window manager is used to manage icons, windows, toolbars, wallpapers, and desktop widgets on the user interface.

[0069] In some embodiments, the activity manager is used to manage the life cycle of each application and the common navigation back function, such as controlling the exit, opening, and back of the application. The window manager is used to manage all window programs, such as obtaining the display screen size, determining whether there is a status bar, locking the screen, capturing the screen, and controlling the display window changes (for example, reducing the display window, shaking the display, distorting the display, etc.).

[0070] In some embodiments, the system runtime layer provides support for the upper layer, namely the framework layer. When the framework layer is used, the Android operating system will run the C / C++ library contained in the system runtime layer to implement the functions to be implemented by the framework layer.

[0071] In some embodiments, the kernel layer is a layer between hardware and software. 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, etc.

[0072] Based on the hardware and software configuration of the display device 200, in some embodiments, the controller 250 may include a first controller and a second controller. The first controller is only used to control the display process of the display 260, and the second controller is used to process the tasks of various functions in the system, including at least one of running UI objects, processing input signals, and performing audio and video decoding. For example, the second controller may be composed of a mainboard including a SOC (System on a Chip), and the first controller may be composed of a logic board (TCON board) including a TCON (Timing Controller).

[0073] In some embodiments, the second controller is the main chip of the display device 200, and the first controller is the sub-chip of the display device 200, and the two can exist independently on the main board and the logic board. Figure 5 As shown, the second controller is SOC, and the first controller is TCON; SOC is arranged on the main board, and TCON is arranged on the TCON board. Figure 5 In the embodiment, Chip On Film 2501 (COF) is a soft film assembly technology for fixing an integrated circuit (IC) on a flexible circuit board. TC ON can achieve back-end black shielding based on the Chip On Film 2501 to eliminate the Mura (uneven) effect when the display 260 is displayed; the source driver board 2502 is an S-PCB board.

[0074] Among them, TCON includes a timing control circuit 2504 (TCON IC) and a level conversion integrated circuit 2505 (Levelshifter IC); the main board and the TCON board are connected through a flexible flat cable 2506 (Flexible Flat Cable, FFC), the TCON board and the source driver board 2502 are connected through a flexible flat cable 2506, the flip chip 2501 includes a flip chip film and a source driver chip, and each source driver chip is connected to the source driver board 2502 and the display 260 through a chip control pin. The chip control pin can be used to drive the Gate pole, open the Gate pole row by row or column by column, so as to realize the scanning function of the TCON board.

[0075] In some other embodiments, the first controller may be integrated into the second controller. That is, the second controller is a mainboard including a main chip, and the first controller is a sub-chip; the sub-chip is integrated into the mainboard to serve as a sub-module in the mainboard. In this case, a circuit board (mainboard) includes at least two chips, namely the main chip and the sub-chip.

[0076] Of course, no matter the first controller and the second controller are two independent chips or integrated chips, through the above-mentioned first controller and the second controller, the display device 200 can present the playback screen corresponding to the audio and video signal received by the device interface 240 in the display 260. 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 signal and perform image processing on the audio and video signal. The screen parameter mode is used to set the display screen parameters of the display device 200. The display screen parameters include but are not limited to the resolution, the number of horizontal and vertical pixels, the refresh rate and other screen parameters; the first controller is used to convert the audio and video signal into a driving signal at the corresponding refresh rate according to the screen parameter mode set by the second controller, and then send the driving signal to the display 260, so that the display 260 displays the playback screen of the audio and video signal based on the driving signal. Among them, the driving signal is a signal suitable for display by the display 260. For example, the first controller can convert the received audio and video signal into a driving signal in a format such as a mini-LVDS signal or an RSDS signal.

[0077] For the convenience of description, in the embodiment of the present application, the audio and video signals for display received by the device interface 240 are referred to as input signals.

[0078] In some embodiments, the display device 200 can be connected to other external devices through the device interface 240. The device interface 240 can be an interface such as a USB interface, an HDMI interface, and the external device can be a game console, a PC, or other devices. When the display device 200 is connected to an external device through the device interface 240, a corresponding signal source channel can be established, and an input signal can be received through the signal source channel. For example, the display device 200 can be connected to a game console through an HDMI interface to establish an HDMI channel, and receive a game signal sent by the game console based on the HDMI channel.

[0079] like Figure 6As shown, when the device interface 240 is an HDMI interface, in some embodiments, the display device 200 is connected to other external devices through the HDMI input (HDMI in), the display device 200 acts as a sink, and the external device acts as a source. When the external device is connected to the display device 200, the external device pulls up the 5V voltage through the HDMI interface so that the 5V voltage can be added to the HDMI interface of the display device 200 at the same time. For example, when the external device is connected to the HDMI of the display device 200, the external device can add the 5V voltage to the display device 200 through the 18th pin (PWR_CON_PIN18) of the HDMI interface, and read the EDID (Extended Display Identification Data) of the display device 200 based on the HDMI interface. Among them, the EDID includes information such as the refresh rate that the display device 200 can support.

[0080] After the display device 200 detects a stable 5V voltage signal, it prepares the HDCP key, EDID file, and pulls up the HPD (Hot Plug Detection) signal. HDCP (High-bandwidth Digital Content Protection) is a content protection technology that can perform data encryption and authorization verification. Each device is preset with a key for performing verification.

[0081] After detecting that the HPD is pulled high, the external device performs an HDCP check with the display device 200, and reads the EDID of the display device 200 through the DDC (Display Data Channel) of the HDMI interface. Among them, the EDID includes device-related information of the display device 200, such as resolution, refresh rate, and color support. The external device then transmits input signals to the display device 200 through the TMDS (Transition Minimized Differential Signaling) data channel and TMDS clock channel in the HDMI interface based on the EDID information, so that the display device 200 plays or displays the audio and video data of the external device. Among them, the TMDS data channel is used to transmit the RGB data of the pixel points, and the TMDS clock channel is used to maintain the unified timing required for transmission.

[0082] In some embodiments, the HDMI interface is also configured with CEC (Consumer Electronics Control Channel). The display device 200 can report its own status to the external device through CEC, and CEC supports multiple commands and functions, such as power on / off control, volume control, input switching, etc.

[0083] In some embodiments, the screen refresh rate that the display device 200 can support is limited by the screen performance and driving voltage. For example, in hardware, the TCON of the display device 200 can support 60Hz output. At this time, 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 that the display device 200 can support (such as obtaining EDID) based on a specific application, and then send the corresponding input signal to the display device 200 according to the obtained refresh rate.

[0084] Exemplarily, the external device 500 may obtain the refresh rate that the display device 200 can support according to the EDID of the display device 200, and then send the corresponding input signal to the display device 200 according to the refresh rate that the display device 200 can support. For example, 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 may send a 60Hz input signal to the display device 200 based on the device interface 240.

[0085] In order to meet the needs of high refresh rate scenes such as games, events, and movie watching, in some embodiments, the display device 200 can also configure specific software services in the display device 200 to improve the refresh rate it can support. For example, the display device 200 can be configured with software services of HSR and DLG technology, adjust the way TCON scans the pixels of the input signal, and implement the frequency doubling function, thereby improving the refresh rate that the display device 200 can support.

[0086] In some embodiments, for the DLG frequency doubling function, when the display device 200 is configured with the software service of the DLG technology, the SOC can send a control instruction to the TCON based on the software service of the DLG technology, so that the TCON simultaneously opens two rows of gate poles instead of scanning line by line, thereby reducing the time consumption of the display driving signal, thereby improving the refresh rate of the display device 200. Figure 7 As shown, under the DLG technology, double-row scanning is performed, two rows of pixels are scanned at a time and the two rows have the same content, that is, G1 = G2. However, the amount of information of the input signal will be reduced by half, resulting in a decrease in the clarity of the playback image.

[0087] In order to reduce the loss of clarity caused by the frequency doubling function, in some embodiments, for the HSR frequency doubling function, the difference display is achieved by adjusting the timing. Figure 8 As shown in the figure, under the HSR technology, only the pixels of odd or even rows are scanned, and the other row fuses the information of two adjacent rows. That is, taking the scanning of odd rows as an example, G1=G1, G2=G1+G3 / 2 (interpolation processing). In this way, the frequency doubling function realized by the HSR technology can improve the problem of reduced clarity caused by the reduction of information while increasing the refresh rate.

[0088] Based on the above-mentioned frequency doubling function, the display device 200 can improve its supported refresh rate by reducing the time for TCON to scan pixels. For example, a display device that supports 60Hz in hardware can increase the supported refresh rate to 120Hz through the frequency doubling function. In some embodiments, the device interface 240 can also support input signals with higher refresh rates. In the embodiment of the present application, the device interface 240 is taken as an HDMI interface as an example for illustration, but it is not limited to it. In some embodiments, the HDMI interface can also support input signals with high refresh rates (also referred to as high frame rates) such as 144Hz.

[0089] In order to adapt to the dynamic display scene of the display device 200, in some embodiments, the display device 200 is also configured with a variable refresh rate function, which supports an external device to send a variable refresh rate signal to the display device 200, such as a VRR (Variable Refresh Rate) signal or a FreeSync signal, thereby improving the tearing or jitter problems that occur when the display device 200 displays the playback screen at a fixed refresh rate. Among them, VRR and FreeSync technology synchronizes the refresh rate of the drive signal with the refresh rate of the input signal by dynamically adjusting the refresh rate of the display 260 (ie, TCON). That is, the display device 200 can dynamically adjust the refresh rate of TCON based on the variable refresh rate function according to the change of the refresh rate in the input signal, so that the converted drive signal is synchronized with the refresh rate of the input signal.

[0090] However, the refresh rate range supported by the variable refresh rate function is limited. When the variable refresh rate function of the display device 200 is enabled, the refresh rate range supported by the display device 200 is fixed, and the external device can only send input signals with refresh rates within the range to the display device 200, and cannot send input signals with high refresh rates to the display device 200, resulting in increased limitations of the variable refresh rate function. For example, the refresh rate supported by the display 260 is 60Hz, and the VRR configuration range is 48-60Hz, and the external device cannot send VRR signals greater than 60Hz to the display device 200.

[0091] Based on the above application scenarios, some embodiments of the present 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 screen of an input signal; the device interface 240 is configured to connect an external device and receive an input signal sent by the external device. The input signal may be a constant refresh rate signal or a variable refresh rate signal, the constant refresh rate signal refers to an input signal with a fixed refresh rate, and the variable refresh rate signal refers to an input signal with a dynamically changing refresh rate. For example, a variable refresh rate signal may be a VRR signal or a FreeSync signal.

[0092] like Fig. 9 As shown, the controller 250 is configured to perform the following program steps:

[0093] S9001: In response to a change event of the input signal, detecting a target refresh rate of the input signal.

[0094] The display device 200 is connected to the external device 500 via the HDMI in interface. The display device 200 acts as a receiving end and the external device 500 acts as a sending end. Figure 6 After the verification shown, the external device 500 sends a corresponding input signal to the display device 200 according to the EDID of the display device 200 .

[0095] For example, the external device 500 pulls up the 5V voltage signal through the 18th pin of the HDMI interface. After the display device 200 detects the stable 5V voltage, it prepares its own HDCP key and EDID, and pulls up the HPD signal. When the external device 500 detects that the HPD is pulled high, it reads the EDID of the display device 200 through the DDC channel (I2C) of the 15th and 16th pins of the HDMI interface to determine the resolution, refresh rate and other functions supported by the display device 200. Then, the HDCP check of the display device 200 and the external device 500 is performed based on the HDMI interface. After the check is passed, the external device 500 sends the input signal it can support to the display device 200 through the TDMS data channel and the TDMS clock channel according to the EDID of the display device 200.

[0096] In some embodiments, when the input signal changes from non-existent to present, or the signal type of the input signal changes, the display device 200 generates an input signal change event. For example, the display device 200 is connected to the external device 500 through the HDMI interface, and when the input signal sent by the external device 500 is received, an input signal change event is generated; or 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.), an input signal change event is generated.

[0097] After detecting the change event of the above-mentioned input signal, the display device 200 detects the target refresh rate of the input signal in response to the change event. 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. Among them, 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 refresh rate is twice the first refresh rate; the fourth refresh rate is not equal to the first refresh rate, the second refresh rate and the third refresh rate, that is, the fourth refresh rate is a refresh rate other than the first refresh rate, the second refresh rate and the third refresh rate.

[0098] For the sake of convenience, the embodiment of the present application is described by taking the screen refresh rate supported by the display 260 as 60Hz, the first refresh rate as 60hz, the second refresh rate as 120hz, and the third refresh rate as 144Hz as an example, but it is not limited thereto, and the above refresh rates can also be refresh rates of other values, such as 120Hz, 240hz, and 288hz, etc. Correspondingly, in some embodiments of the present application, the variable refresh rate range is 48Hz-144Hz as an example, but it is not limited thereto, and the variable refresh rate range can also be other ranges, such as 48Hz-288Hz, etc.

[0099] Exemplarily, within the variable refresh rate range of 48 Hz-144 Hz, when the first refresh rate is 60 Hz, the second refresh rate is 120 Hz, and the third refresh rate is 144 Hz, the fourth refresh rate is a refresh rate within 48 Hz-144 Hz except 60 Hz, 120 Hz and 144 Hz.

[0100] 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 a suitable input signal to the display device 200 according to the target range. For example, the target range in the EDID corresponding to the display device 200 is configured as 48 Hz-144 Hz, and the external device 500 can send a constant refresh rate signal or a variable refresh rate signal within the range of 48 Hz-144 Hz to the display device 200.

[0101] In order to adapt to 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 screen based on the first refresh rate, the second screen parameter is used to display the playback screen based on the second refresh rate, and the third screen parameter is used to display the playback screen based on the third refresh rate.

[0102] That is, 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 implemented based on the frequency doubling function, that is, when the screen parameter mode of the display device 200 is the second screen parameter mode, the display device 200 needs to enable the frequency doubling function.

[0103] For example, the screen refresh rate supported by the display 260 is 60Hz, the first refresh rate is 60hz, the second refresh rate is 120hz, and the third refresh rate is 144Hz. The first screen parameter mode is 4K2K@60Hz mode, the second screen parameter mode is 4K1K@120Hz mode, and the third screen parameter mode is 4K1K@144Hz mode. Among them, 4K2K and 4K1K represent the number of pixels when displaying the playback picture, and 60Hz, 120Hz, and 144Hz represent the refresh rate when displaying the playback picture.

[0104] In some embodiments, the display device 200 is configured with a frequency multiplication switch to implement the frequency multiplication function, and the frequency multiplication switch includes an on state and an off state. The on state of the frequency multiplication switch is used to enable the frequency multiplication function, and the off state of the frequency multiplication switch is used to disable the frequency multiplication function. Fig.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 the switch control 101 for the frequency multiplier switch to enable the frequency multiplier switch to generate an on or off instruction according to the current property value of the switch control 101, and set the frequency multiplier switch to an on or off state in response to the on or off instruction.

[0105] In some embodiments, when the frequency multiplication switch is turned on, the display device 200 forcibly sets the screen parameter mode to the second screen parameter mode. Accordingly, when the screen parameter mode is set to the second screen parameter mode, the display device 200 forcibly sets the frequency multiplication switch to the turned on state.

[0106] In order to be compatible with the scenarios of variable refresh rate signals and constant refresh rate signals, in some embodiments, the target refresh rate detected by the display device 200 can be a fixed refresh rate of a constant refresh rate signal, or can also be a basic refresh rate of a variable refresh rate signal (such as a VRR signal). Among them, the fixed refresh rate refers to the fixed refresh rate of the external device 500 when the input signal is sent, or it can be called a fixed frame rate; the basic refresh rate refers to the lowest refresh rate that the variable refresh rate signal can support, and the variable refresh rate model can dynamically change between the basic refresh rate and the maximum refresh rate.

[0107] like Fig.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 (S1101) sent by the external device 500. Among them, the extended metadata packet (Extended Metadata Packet, EMP) is sent synchronously with the input signal and can be transmitted based on the TMDS channel of the HDMI interface. Then parse the signal type identifier in the extended metadata (S1102). If the signal type identifier is a preset identifier, the basic refresh rate is read in the target byte of the extended metadata packet to obtain the target refresh rate (S1103). Among them, the preset identifier is used to characterize 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).

[0108] 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 basic refresh rate in the variable refresh rate signal is used as the target refresh rate.

[0109] For example, as shown in the following table, the following table is the extended metadata package (EMP) information of the input signal. In the EMP, bit0 in MD0 is used to store the signal type identifier, and the preset identifier corresponding to the variable refresh rate signal may be VRR_EN. After the display device 200 detects the VRR_EN identifier, it reads the Base_Refresh_Re ate bytes in MD2 and MD3 in the extended metadata package to obtain the base refresh rate of the variable refresh rate signal, namely, "Base_Refresh_Reate[9:0]" and "Base_Refresh_Reate[7:0]" shown in the table.

[0110]

[0111] It is understandable that the various bits and characters stored in the above-mentioned extended metadata package are only exemplary and not unique. The display device 200 can also characterize the signal type of the input signal and the basic refresh rate of the variable refresh rate signal through other bits or characters. This application does not limit this.

[0112] S9002: Get the current screen parameter mode of the display device.

[0113] After the display device 200 detects the fixed refresh rate of the constant refresh rate signal or the basic refresh rate of the variable refresh rate signal, the current screen parameter mode of the display device 200 is obtained, that is, the screen parameter mode currently set by the display device 200, which can be one of the first screen parameter mode, the second screen parameter mode and the third screen parameter mode. For example, when the currently set screen parameter mode is the 4K2K@60Hz mode, the screen parameter used by the display device 200 is the screen parameter corresponding to 60Hz, and the current screen parameter mode obtained is the 4K2K@60Hz mode.

[0114] Exemplarily, the display device 200 can obtain the current screen parameter mode based on different methods. For example, the display device 200 can read the screen parameter mode stored in the internal register or state variable to obtain the current screen parameter mode; or, the display device 200 can also query the state 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 also call the service or API provided by the operating system or firmware to obtain the current screen parameter mode; or, the display device 200 can also retrieve the current screen parameter mode from a database or configuration file.

[0115] In some embodiments, after setting the corresponding screen parameter mode, the display device 200 also writes the set screen parameter mode into the database. When the display device 200 is turned off and then turned on again, the written screen parameter mode can be read from the database, and the screen parameter mode of the display device 200 can be set according to the read screen parameter mode, so as to memorize the user operation and improve the user's interactive experience.

[0116] S9003: Set the screen parameter mode to a target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode.

[0117] After the display device 200 detects the current screen parameter mode, the screen parameter mode is set to the 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 screen parameters corresponding to the target screen parameter mode. In some embodiments, the target screen parameter mode can be one of the first screen parameter mode, the second screen parameter mode and the third screen parameter mode.

[0118] For example, the current screen parameter mode is 4K1K@120Hz mode, the input signal is a variable refresh rate signal, and the basic refresh rate of the variable refresh rate signal is 60Hz, and the display device 200 sets the screen parameter mode based on the 4K1K@120Hz mode and the target refresh rate of 60Hz. For another example, the current screen parameter mode is 4K1K@120Hz mode, the input signal is a constant refresh rate signal, and the fixed refresh rate of the constant refresh rate signal is 60Hz, and the display device 200 also sets the screen parameter mode based on the 4K1K@120Hz mode and the target refresh rate of 60Hz.

[0119] The following embodiments illustrate the process of setting the target screen parameter mode for different scenarios.

[0120] Scenario 1: The target refresh rate of the input signal is the first refresh rate

[0121] like Fig.12a 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). Figure 12b As shown, the input signal sent by the external device 500 is a constant refresh rate signal, and 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, and the display device 200 maintains the current screen parameter mode unchanged. Fig.12c As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic refresh rate of the variable refresh rate signal is 60Hz and the current screen parameter mode is 4K2K@60Hz mode. The display device 200 maintains the current screen parameter mode unchanged.

[0122] 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 multiplication switch to the off state (S1204). Figure 12b As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic refresh rate of the variable refresh rate signal is 60Hz and the current screen parameter mode is 4K1K@120Hz mode. The display device 200 turns off the 4K1K@120Hz mode and switches to the 4K2K@60Hz mode. Then, under the display screen parameters of 4K2K@60Hz mode, the frequency multiplication switch (such as the HSR switch) is turned off.

[0123] If the current screen parameter mode is the third screen parameter mode, the display device 200 turns off the third screen parameter mode (S1205) and sets the screen parameter mode to the first screen parameter mode (S1206). Figure 12bAs shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic 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.

[0124] It can be understood that in the embodiment corresponding to the above scenario 1, when the current screen parameter mode is the second screen parameter mode and 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 12b As shown, the corresponding switching logic is the same as the switching logic of the variable refresh rate signal, which will not be repeated here.

[0125] Scenario 2: The target refresh rate of the input signal is the second refresh rate

[0126] like Fig.13a As shown, in some embodiments, if the current screen parameter mode is the first screen parameter mode, the frequency multiplication switch is set to the on state (S1301), and the screen parameter mode is set to the second screen parameter mode (S1302). Fig.13c As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic refresh rate of the variable refresh rate signal is 120Hz and the current screen parameter mode is 4K2K@60Hz mode. The display device 200 turns on the frequency multiplication switch and then sets the screen parameter mode to 4K1K@120Hz mode.

[0127] If the current screen parameter mode is the second screen parameter mode, the display device 200 maintains the second screen parameter mode (S1303). Fig.13c As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic 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.

[0128] If the current screen parameter mode is the third screen parameter mode, turn off the third screen parameter mode (S1304), set the frequency multiplication switch to the on state (S1306), and set the screen parameter mode to the second screen parameter mode (S1307). Fig.13c As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic refresh rate of the variable refresh rate signal is 120Hz and the current screen parameter mode is 4K1K@144Hz mode. The display device 200 turns on the frequency multiplication switch and then sets the screen parameter mode to 4K1K@120Hz mode.

[0129] In some embodiments, after the display device 200 executes step S1304, it further sets the screen parameter mode to the first screen parameter mode (S1305), so as to set the frequency multiplication switch to the on state in the first screen parameter mode. Fig.13a Step S1306 in the embodiment can adapt to some display devices 200 that cannot directly switch the screen parameter mode, thereby improving the reliability of the screen parameter mode setting.

[0130] It can be understood that in the embodiment corresponding to the above scenario 2, the process of setting the target screen parameter mode when the input signal is a constant refresh rate signal is as follows: Fig.13b As shown, the corresponding switching logic is the same as the switching logic of the variable refresh rate signal, which will not be repeated here.

[0131] Scenario 3: The target refresh rate of the input signal is the third refresh rate

[0132] like Fig.14a 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). Fig.14c As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic refresh rate of the variable refresh rate signal is 144Hz and the current screen parameter mode is 4K2K@60Hz mode. The display device 200 sets the screen parameter mode to 4K1K@144Hz mode.

[0133] 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 multiplication switch to the off state (S1404), and sets the screen parameter mode to the third screen parameter mode (S1405). Fig.14c As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic 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 multiplication switch and sets the screen parameter mode to 4K1K@144Hz mode.

[0134] In some embodiments, after the display device 200 executes step S1402, it also sets the screen parameter mode to the first screen parameter mode (S1403), and then sets the frequency multiplication switch to the off state in the first screen parameter mode. Fig.14aStep S1404 in. For example, the display device 200 detects that the basic refresh rate of the variable refresh rate signal is 144 Hz and the current screen parameter mode is 4K1K@120 Hz mode, the display device 200 sets the screen parameter mode to 4K2K@60 Hz mode, turns off the frequency multiplication switch in the 4K2K@60 Hz mode, and then sets the screen parameter mode to 4K1K@144 Hz mode.

[0135] If the current screen parameter mode is the third screen parameter mode, the display device 200 maintains the third screen parameter mode (S1406). Fig.14c As shown, the input signal sent by the external device 500 is a variable refresh rate signal. The display device 200 detects that the basic refresh rate of the variable refresh rate signal is 144Hz and the current screen parameter mode is 4K2K@144Hz mode. The display device 200 maintains the 4K1K@144Hz mode unchanged.

[0136] It can be understood that in the embodiment corresponding to the above scenario three, the process of setting the target screen parameter mode when the input signal is a constant refresh rate signal is as follows: Fig.14b As shown, the corresponding switching logic is the same as the switching logic of the variable refresh rate signal, which will not be repeated here.

[0137] Scenario 4: The target refresh rate of the input signal is the fourth refresh rate

[0138] like Fig.15 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, the input signal sent by the external device 500 is a variable refresh rate signal, and the display device 200 detects that the basic refresh rate of the variable refresh rate signal is 50Hz and the current screen parameter mode is the 4K2K@60Hz mode, and the display device 200 maintains the 4K2K@60Hz mode unchanged.

[0139] 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, the input signal sent by the external device 500 is a variable refresh rate signal, and the display device 200 detects that the basic refresh rate of the variable refresh rate signal is 50Hz and the current screen parameter mode is 4K1K@120Hz mode, and the display device 200 maintains the 4K1K@120Hz mode unchanged.

[0140] Obviously, when the basic 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, at this time, 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 doubling function is enabled, indicating that the user last selected to use the frequency doubling function, so the second screen parameter mode is maintained at this time, and the frequency doubling function is kept enabled.

[0141] If the current screen parameter mode is the third screen parameter mode, turn off the third screen parameter mode (S1503), and set the screen parameter mode to the first screen parameter mode (S1504). For example, the input signal sent by the external device 500 is a variable refresh rate signal, and the display device 200 detects that the basic 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 normally display the 50Hz playback picture, the display device 200 sets the screen parameter mode to 4K2K@60Hz mode.

[0142] It can be understood that in the embodiment corresponding to the above scenario four, 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 the variable refresh rate signal, which will not be repeated here.

[0143] S9004: Control the display to display the playback screen of the input signal according to the target screen parameter mode.

[0144] After the display device 200 sets the screen parameter mode to the target screen parameter mode based on the target refresh rate and the current screen parameter mode, it can control the display 260 to display the playback screen corresponding to the input signal according to the display screen parameter corresponding to the target screen parameter mode. For example, the SOC processes the input signal according to the target screen parameter mode, and 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.

[0145] In some embodiments, the display device 200 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 instruction corresponding to the target screen parameter mode to the first controller. The first controller is configured to respond 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 260, so that the display 260 displays the playback screen of the input signal based on the drive signal.

[0146] 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 screen parameter mode is set to 4K2K@60Hz mode through SOC, and a 60Hz setting instruction is sent to TCON at the same time. TCON responds to the 60Hz setting instruction and converts the input signal into a corresponding drive signal according to the 4K2K@60Hz mode. It is worth noting that in the embodiment of the present application, 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.

[0147] Based on the above display device 200, some embodiments of the present application also provide a display method of a variable refresh rate signal, which can be applied to the display device 200 provided in the above embodiment, wherein 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 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. Fig. 9 As shown, the method comprises the following steps:

[0148] S9001: In response to a change event of the input signal, detecting a target refresh rate of the input signal, where the target refresh rate is a fixed refresh rate of the constant refresh rate signal or a basic refresh rate of the variable refresh rate signal;

[0149] S9002: Obtain the current screen parameter mode of the display device;

[0150] S9003: Setting the screen parameter mode to a target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode;

[0151] S9004: Control the display to display the playback screen of the input signal according to the target screen parameter mode.

[0152] It can be seen from the above technical solutions that some embodiments of the present application provide a display device and a display method for a variable refresh rate signal, and the method can detect the target refresh rate of the input signal in response to a change event of the input signal. Among them, 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 basic refresh rate of a variable refresh rate signal. Then, the current screen parameter mode of the display device 200 is 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, and then the display is controlled to display the playback screen of the input signal according to the target screen parameter mode. The method sets different screen parameter modes by the fixed refresh rate or basic refresh rate of the input signal, so that the display device 200 can display the playback screen of the input signal according to the corresponding screen parameters, thereby realizing the variable refresh rate function of the high refresh rate signal and improving the user experience.

[0153] The same and similar parts between the various embodiments in this specification can be referenced to each other and will not be described again here.

[0154] Those skilled in the art can clearly understand that the technology in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution in the embodiments of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of various embodiments of the present invention or certain parts of the embodiments.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0156] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: include: A display configured to display a playback screen of an input signal; A device interface, 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 as: In response to a change event of the input signal, detecting a target refresh rate of the input signal, the target refresh rate being 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 parameter mode of the display device; Setting the screen parameter mode to a target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode; Control the display to display the playback picture of the input signal according to the target screen parameter mode.

2. The display device according to claim 1, characterized in that The controller detects the target refresh rate of the input signal and is configured to: Receiving an extended metadata data packet sent by the external device; Parsing the signal type identifier in the extended metadata; If the signal type identifier is a preset identifier, the basic refresh rate is read in the target byte of the extended metadata packet to obtain the target refresh rate, and the preset identifier is used to indicate that the input signal is the variable refresh rate signal; If the signal type identifier is not the preset identifier, a fixed refresh rate when the external device sends the input signal is calculated to obtain the target refresh rate.

3. The display device according to claim 1, characterized in that 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 the second refresh rate is twice the first refresh rate; The fourth refresh rate is not equal to the first refresh rate, the second refresh rate and the third refresh rate; The screen parameter mode includes 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 screen based on the first refresh rate, the second screen parameter is used to display the playback screen based on the second refresh rate, and the third screen parameter is used to display the playback screen based on the third refresh rate.

4. The display device according to claim 3, characterized in that When the target refresh rate is the first refresh rate, the controller sets 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, maintaining the first screen parameter mode; If the current screen parameter mode is the second screen parameter mode, turn off the second screen parameter mode, set the screen parameter mode to the first screen parameter mode, and set the frequency multiplication switch to an off state; the off state of the frequency multiplication switch is used to disable the frequency multiplication function; 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 3, characterized in that When the target refresh rate is the second refresh rate, the controller sets 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, the frequency multiplication switch is set to the on state, and the screen parameter mode is set to the second screen parameter mode; the on state of the frequency multiplication switch is used to enable the frequency multiplication function; If the current screen parameter mode is the second screen parameter mode, maintaining the second screen parameter mode; If the current screen parameter mode is the third screen parameter mode, turn off the third screen parameter mode, set the frequency multiplication switch to an on state, and set the screen parameter mode to the second screen parameter mode.

6. The display device according to claim 3, characterized in that When the target refresh rate is the third refresh rate, the controller sets 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, setting the screen parameter mode to the third screen parameter mode; If the current screen parameter mode is the second screen parameter mode, turn off the second screen parameter mode, set the frequency multiplication switch to an off state, and set the screen parameter mode to the third screen parameter mode; the off state of the frequency multiplication switch is used to disable the frequency multiplication function; If the current screen parameter mode is the third screen parameter mode, maintain the third screen parameter mode.

7. The display device according to claim 6, characterized in that After the controller executes closing the second screen parameter mode, the controller is further configured to: Setting the screen parameter mode to the first screen parameter mode; In the first screen parameter mode, the frequency multiplication switch is set to the closed state.

8. The display device according to claim 3, characterized in that When the target refresh rate is the fourth refresh rate, the controller sets 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, maintaining the first screen parameter mode; If the current screen parameter mode is the second screen parameter mode, maintaining the second screen parameter mode; 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.

9. 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 a target screen parameter mode, and send a refresh rate setting instruction 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 driving signal according to the target screen parameter mode, and send the driving signal to the display so that the display displays the playback picture of the input signal based on the driving signal.

10. A method for displaying a variable refresh rate signal, characterized in that: 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 screen of an input signal, the device interface is configured to connect 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, detecting a target refresh rate of the input signal, the target refresh rate being 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 parameter mode of the display device; Setting the screen parameter mode to a target screen parameter mode, wherein the target screen parameter mode is set based on the target refresh rate and the current screen parameter mode; Control the display to display the playback picture of the input signal according to the target screen parameter mode.

Images