Display device, and high-refresh-rate signal display method for display device

Abstract

Disclosed in the present application are a display device, and a high-refresh-rate signal display method for a display device. The display device may comprise a first processor and a second processor, wherein the first processor may be configured to execute a computer program in a memory, such that the display device can respond to a setting instruction for a refresh rate, convert, on the basis of display screen parameters, an input signal into a driving signal applicable to a display, and send the driving signal to the display; and the second processor may be configured to execute a computer program, such that the display device executes blackout on a playback picture in response to a refresh rate change event of the input signal. The method comprises: sending to a first processor a setting instruction for a target refresh rate, and on the basis of the target refresh rate, setting display screen parameters, such that the first processor converts an input signal into a driving signal for the target refresh rate; on the basis of the display screen parameters, setting width and height dimensions of a playback picture; and cancelling blackout, such that a display displays a playback picture of the driving signal on the basis of the target refresh rate. Thus, the display effect during switching of refresh rate signals is improved.

Description

Display device and high refresh signal display method for display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410127724.6, filed on January 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of display devices, and in particular to a display device and a high refresh signal display method for the display device. Background Art

[0004] Display devices are terminal devices that can present a user interface and support user interaction. Taking smart TVs as an example, they are based on Internet application technology, feature an open operating system and chips, and possess an open application platform. They enable two-way human-computer interaction and integrate multiple functions, including audio, video, entertainment, and data, to meet the diverse and personalized needs of users.

[0005] The display device may be provided with a device interface, and data interaction with the external device can be achieved 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 picture corresponding to the input signal on the monitor. Due to the limitations of hardware performance such as liquid crystal performance and driving voltage, the refresh rate that the display device can support is limited. Therefore, in order to meet the needs of high refresh rate scenarios such as games, events, and movie watching, the display device can also improve its own supportable refresh rate through software technology. For example, the display device can support 120HZ output in hardware, and the display device can increase the refresh rate to 240HZ in software.

[0006] However, under the HDMI channel, the HDMI interface can also accept high-refresh rate signals with higher refresh rates, such as 144HZ and 288HZ. However, because input signals with different refresh rates have different characteristics, the processing logic for input signals with different refresh rates is also different. Therefore, if the refresh rate of the input signal connected to the HDMI interface changes, the display device is prone to display failures due to data inconsistency, affecting the display quality of the high-refresh signal. Summary of the Invention

[0007] According to some embodiments of the present application, a display device is provided, which may include a display, a device interface, a memory and a processor; wherein the display may be configured to display a playback image of a driving signal; the device interface may be configured to connect to an external device and receive an input signal sent by the external device; the memory may be configured to store a computer program; the processor is connected to the display, the device interface and the memory, and the processor may include a first processor and a second processor; the first processor may be configured to execute the computer program to enable the display device to perform: in response to a refresh rate setting instruction, convert the input signal into a driving signal suitable for the display according to display screen parameters, and The driving signal is sent to the display; the second processor can be configured to execute the computer program to enable the display device to perform: in response to the refresh rate change event of the input signal, the playback screen can be masked; the refresh rate change event can be a change event from the initial refresh rate to the target refresh rate; the target refresh rate setting instruction can be sent to the first processor; the display screen parameters can be set based on the target refresh rate so that the first processor can convert the input signal into a driving signal of the target refresh rate; the width and height of the playback screen can be set based on the display screen parameters; the masking can be revoked so that the display can display the playback screen of the driving signal at the target refresh rate.

[0008] According to some embodiments of the present application, a high refresh signal display method for a display device is also provided, which may include: in response to a refresh rate change event of an input signal, masking the playback screen; the refresh rate change event may be a change event from an initial refresh rate to a target refresh rate; a setting instruction for the target refresh rate may be sent to a first processor; the display screen parameters may be set based on the target refresh rate so that the first processor may convert the input signal into a drive signal of the target refresh rate; the width and height of the playback screen may be set based on the display screen parameters; the masking may be revoked so that the display may display the playback screen of the drive signal at the target refresh rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic diagram of a usage scenario of a display device according to some embodiments of the present application;

[0010] FIG2 is a block diagram of a hardware configuration of a control device according to some embodiments of the present application;

[0011] FIG3 is a block diagram of a hardware configuration of a display device according to some embodiments of the present application;

[0012] FIG4 is a schematic diagram of software configuration in a display device according to some embodiments of the present application;

[0013] FIG5 is a configuration block diagram of a processor according to some embodiments of the present application;

[0014] FIG6 is a schematic structural diagram of a first processor and a second processor according to some embodiments of the present application;

[0015] FIG7 is an interaction diagram of an HDMI interface provided according to some embodiments of the present application;

[0016] FIG8 is a schematic diagram of a DLG frequency multiplication function according to some embodiments of the present application;

[0017] FIG9 is a schematic diagram of the HSR frequency doubling function provided according to some embodiments of the present application;

[0018] FIG10 is a schematic diagram of a flow chart of a method for displaying a high refresh signal using a display device according to some embodiments of the present application;

[0019] FIG11 is a schematic diagram showing the relationship between the refresh rate of an input signal and a driving signal according to some embodiments of the present application;

[0020] FIG12 is a flow chart of a method for displaying a high refresh rate signal in a scenario according to some embodiments of the present application;

[0021] FIG13 is a flow chart of a method for displaying a high refresh rate signal in another scenario according to some embodiments of the present application;

[0022] FIG14 is a schematic flow chart of a method for displaying a high refresh rate signal in another scenario according to some embodiments of the present application;

[0023] FIG15 is a flow chart of a method for displaying a high refresh rate signal in another scenario according to some embodiments of the present application;

[0024] FIG16 is a flow chart of a method for displaying a high refresh rate signal in another scenario according to some embodiments of the present application;

[0025] FIG17 is a flow chart of a method for displaying a high refresh rate signal in another scenario according to some embodiments of the present application;

[0026] FIG18 is a schematic diagram showing the effect of a frequency doubling function view interface provided according to some embodiments of the present application. DETAILED DESCRIPTION

[0027] In order to make the purposes, schemes and advantages of some embodiments of the present application clearer, the schemes in the present application will be clearly and completely described below in conjunction with the drawings in some embodiments of the present application. Obviously, the one or more embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on some embodiments shown in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, although the disclosure in the present application is introduced according to one or several exemplary examples, it should be understood that each aspect of the disclosure can also constitute a complete solution separately.

[0028] It should be understood that the terms "first," "second," "third," etc., in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for example, enabling implementation in an order other than that shown or described in the embodiments of this application.

[0029] In addition, the terms "comprises" and "comprising" 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 product or device.

[0030] The display device provided in the embodiments of the present application can have various implementation forms, for example, it can be a television, a smart TV, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc. Figures 1 and 3 illustrate a specific embodiment of the display device of the present application.

[0031] Figure 1 is a schematic diagram of an operation scenario between a display device and a control device according to some embodiments of the present application. As shown in Figure 1, a user can operate a display device 200 through a smart device 300 or a control device 100.

[0032] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device may include infrared protocol communication, Bluetooth protocol communication, or other short-range communication methods, and the display device 200 may be controlled wirelessly or wired. The user may control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0033] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) can also be used to control the display device 200. For example, the display device 200 can be controlled using an application running on the smart device.

[0034] In some embodiments, the display device 200 may not use the aforementioned smart device or control device to receive instructions, but may receive user control through touch or gestures.

[0035] 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, the user's voice command control can be 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.

[0036] In some embodiments, the display device 200 can also communicate data with the server 400. The display device 200 can be connected to a local area network (LAN), a wireless local area network (WLAN), or other networks. The server 400 can provide various content and interactions to the display device 200. The server 400 can be a single cluster or multiple clusters, and can include one or more types of servers.

[0037] Figure 2 is a block diagram of a control device according to some embodiments of the present application. As shown in Figure 2, the control device 100 may include at least one processor 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply. The control device 100 may receive user input commands and convert them into commands that the display device 200 can recognize and respond to, acting as an intermediary for interaction between the user and the display device 200.

[0038] As shown in FIG. 3 , the display device 200 may include at least one of a tuner 210 , a communication device 220 , a detector 230 , a device interface 240 , a processor 250 , a display 260 , an audio output interface 270 , a memory, a power supply, and a communication device interface 280 .

[0039] In some embodiments, the processor may include at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), a random access memory (RAM), a read-only memory (ROM), a first interface to an nth interface for input / output, a communication bus (Bus), etc.

[0040] In some embodiments, the display 260 may include a display screen component that can be used to present images, and a driving component that drives the image display, which can be used to receive image signals output from the processor, and display video content, image content, and menu control interface components and user control UI interfaces.

[0041] In some embodiments, the display 260 may be a liquid crystal display, an organic light-emitting diode (OLED) display, a projection display, or a projection device and a projection screen.

[0042] In some embodiments, the communication device 220 is a component that can be used to communicate with external devices or servers using various communication protocols. For example, the communication device can include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chip or a near-field communication protocol chip, as well as an infrared receiver. The display device 200 can use the communication device 220 to send and receive control signals and data signals with the control device 100 or the server 400.

[0043] In some embodiments, the communication device interface 280 may be used to receive a control signal from the control device 100 (eg, an infrared remote controller, etc.).

[0044] In some embodiments, detector 230 may be configured to collect signals from the external environment or external interactions. For example, detector 230 may include a light receiver configured as a sensor for collecting ambient light intensity; alternatively, detector 230 may include an image collector, such as a camera, configured to collect external environmental scenes, user attributes, or user interaction gestures; alternatively, detector 230 may include a sound collector, such as a microphone, configured to receive external sounds.

[0045] In some embodiments, the device interface 240 may include, but is not limited to, any one or more of the following: a High Definition Multimedia Interface (HDMI), an analog or digital high-definition component input interface (component), a composite video input interface (Composite Video Broadcast Signal or Composite Video Blanking and Sync, CVBS), a Universal Serial Bus (USB) input interface (USB for short), an RGB port, or the like. Alternatively, the device interface 240 may be a composite input / output interface formed by multiple of the aforementioned interfaces.

[0046] In some embodiments, the tuner-demodulator 210 may receive broadcast television signals via wired or wireless reception, and demodulate audio and video signals, such as an Electronic Program Guide (EPG) data signal, from multiple wireless or wired broadcast television signals.

[0047] In some embodiments, the processor 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 processor 250 is located, such as an external set-top box.

[0048] In some embodiments, processor 250 may control the operation of the display device and respond to user operations using various software control programs stored in memory, such as computer programs. Processor 250 may control the overall operation of display device 200. For example, in response to receiving a user command to select a UI object for display on display 260, processor 250 may perform operations related to the object selected by the user command.

[0049] The user can input user commands through the Graphic User Interface (GUI) displayed on the display 260, and the user input interface receives the user input commands through the Graphic User Interface (GUI). Alternatively, the user can input user commands by inputting specific sounds or gestures, and the user input interface recognizes the sounds or gestures through sensors to receive the user input commands. "User interface" is a medium interface for interaction and information exchange between an application or operating system and a user, which realizes the conversion between the internal form of information and the form acceptable to the user. The commonly used form of user interface is the Graphic User Interface (GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. 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 visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, widgets, etc.

[0050] Figure 4 is a schematic diagram of the software configuration in the display device provided according to some embodiments of the present application. In some embodiments, the system of the display device 200 can be divided into three layers, namely, the application layer, the middleware layer and the hardware layer from top to bottom.

[0051] In some embodiments, the application layer may include commonly used applications on the TV and an application framework. Common applications may be applications developed based on a browser, such as HyperText Markup Language (HTML) 5 APPs; and native applications.

[0052] In some embodiments, the Application Framework is a complete program model that has all the basic functions required by standard application software, such as file access, data exchange, etc., as well as the user interfaces of these functions (toolbars, status bars, menus, dialog boxes).

[0053] In some embodiments, native apps may support online or offline operation, message push, or local resource access.

[0054] In some embodiments, the middleware layer may include various television protocols, multimedia protocols, and system components. The middleware can utilize the basic services (functions) provided by the system software to connect various parts of the application system or different applications on the network, thereby achieving resource and function sharing.

[0055] In some embodiments, the hardware layer may include a hardware abstraction layer (HAL) interface, hardware, and drivers. The HAL interface is a unified interface for all TV chipsets, while the specific logic is implemented by each chip. Drivers may include: audio driver, display driver, Bluetooth driver, camera driver, Wi-Fi driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver.

[0056] Based on the hardware and software configuration of the display device described above, as shown in FIG5 , in some embodiments, the processor 250 may include a first processor 251 and a second processor 252. The first processor 251 may be configured to handle various system functions, including at least one of running UI objects, processing input signals, and performing audio and video decoding; while the second processor 252 may be configured to control the display process of the display 260. For example, the second processor 252 may be composed of a motherboard including a system on a chip (SOC), and the first processor 251 may be composed of a logic board (TCON board) including a timing controller chip (TCON).

[0057] In some embodiments, the second processor 252 is the main chip of the display device 200, and the first processor 251 is a sub-chip of the display device 200. The two can exist independently on the main board and the logic board. For example, as shown in Figure 6, the second processor 252 is a SOC and the first processor 251 is a TCON; the SOC is set on the main board, and the TCON is set on the TCON board. In Figure 6, Chip On Film (COF) is a soft film assembly technology for fixing an integrated circuit (IC) on a flexible circuit board. The TCON can achieve back-end black shielding based on COF to eliminate the Mura (uneven) effect when the display 260 is displayed; the S-PCB board is the source driver board.

[0058] In some embodiments, the TCON may include a TCON IC (timing control circuit) and a level shifter IC (level conversion integrated circuit); the mainboard and TCON board may be connected via a flexible flat cable (FFC), and the TCON board and S-PCB board may be connected via the FFC. The COF may include a chip-on-film (COF) and a source driver chip. Each source driver chip may be connected to the S-PCB board and the display 260 via a chip control pin. The chip control pin can be used to drive the gate electrode, opening the gate electrode row by row or column by column, thereby realizing the scanning function of the TCON board.

[0059] In other embodiments, the first processor 251 may be integrated into the second processor 252. That is, the second processor 252 is a mainboard including a main chip, and the first processor 251 is a sub-chip. The sub-chip is integrated into the mainboard, making it a sub-module within the mainboard. In this case, a circuit board (mainboard) may include at least two chips: the main chip and the sub-chip.

[0060] Of course, regardless of whether the first processor 251 and the second processor 252 are two independent chips or integrated into one chip, the display device 200 can present the playback screen corresponding to the audio and video signal received by the device interface 240 on the display 260 through the above-mentioned first processor 251 and second processor 252. In this process, the second processor 252 can be configured to execute the computer program in the memory to enable the display device to: set the display screen parameters of the display device 200 according to the refresh rate of the audio and video signal, which may include but is not limited to part or all of the screen parameters such as resolution, number of horizontal and vertical pixels, and refresh rate; the first processor 251 can be configured to execute the aforementioned computer program to enable the display device to: convert the audio and video signal into a corresponding driving signal at the refresh rate according to the display screen parameters set by the second processor 252, 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 at the refresh rate. Among them, the driving signal is a signal suitable for display on the display 260. For example, the first processor 251 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.

[0061] For ease of description, in some embodiments of the present application, the first processor 251 is referred to as TCON, the second processor is referred to as SOC, and the audio and video signals received by the device interface 240 for display are referred to as input signals.

[0062] In some embodiments, the display device 200 can be connected 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 set-top box, a game console, a PC, or other device. When the display device 200 is connected to an external device via the device interface 240, a corresponding signal source channel can be established, and input signals can be received via the signal source channel. For example, the display device 200 can be connected to a set-top box via an HDMI interface to establish an HDMI channel, and receive audio and video signals sent by the set-top box based on the HDMI channel.

[0063] As shown in Figure 7, when the device interface 240 is an HDMI interface, in some embodiments, the display device is connected to other external devices via the HDMI input (HDMI in), the display device acts as a sink, and the external device acts as a source. When the external device is connected to the display device, the external device pulls up the 5V voltage through the HDMI interface so that the 5V voltage can be applied to the HDMI interface of the display device at the same time. For example, when the external device is connected to the HDMI of the display device, the external device can apply the 5V voltage to the display device 200 through the 18th pin (PWR_CON_PIN18) of the HDMI interface, and read the extended display identification data (EDID) of the display device based on the HDMI interface.

[0064] After the display device detects a stable 5V voltage signal, it prepares the High-bandwidth Digital Content Protection (HDCP) key and EDID file, and then pulls up the Hot Plug Detection (HPD) signal. HDCP is a content protection technology that encrypts data and verifies authorization. Each device has a pre-set key for verification.

[0065] After detecting that HPD is pulled high, the external device can perform HDCP verification with the display device and read the EDID of the display device through the Display Data Channel (DDC) of the HDMI interface. Among them, the EDID may include device-related information of the display device, such as resolution, refresh rate, and color support. Based on the EDID information, the external device can then transmit input signals to the display device through the Transition Minimized Differential Signaling (TMDS) data channel and TMDS clock channel in the HDMI interface, allowing the display device to play or display the audio and video data of the external device. Among them, the TMDS data channel can be used to transmit the RGB data of the pixel points, and the TMDS clock channel can be used to maintain the unified timing required for transmission.

[0066] In some embodiments, the HDMI interface can also be configured with a Consumer Electronics Control Channel (CEC). The display device can report its status to external devices through CEC, and CEC supports various commands and functions, such as power on and off, volume control, input switching, etc.

[0067] However, due to the limitations of screen performance and driving voltage, the refresh rate that the display 260 can support when displaying the playback image of the input signal is limited. For example, in hardware, the TCON of the display device 200 can support 120Hz output, that is, the TCON can receive a 120Hz / 144Hz input signal and convert it into a 120Hz driving signal, that is, the TCON can achieve a 120Hz signal output. Therefore, in some embodiments, when the device interface 240 is connected to other external devices, the external device can detect the refresh rate that the display device 200 can support based on a specific application, such as obtaining the refresh rate that the display device 200 can support based on the EDID of the display device 200, and sending an input signal of the corresponding refresh rate to the display device 200 according to the refresh rate that the display device 200 can support. For example, when the display device 200 supports a refresh rate of 120Hz, the external device can send a 120Hz input signal to the display device 200 based on the device interface.

[0068] To meet the needs of high refresh rate scenarios such as gaming, sports events, and movie watching, in some embodiments, the display device 200 can also configure specific software services in the middleware layer shown in Figure 4 to increase its supported refresh rate. For example, the display device 200 can configure software services for hardware super resolution (HSR) technology and dual line gate (DLG) technology in the middleware layer to adjust the way the TCON scans the input signal pixels to achieve a frequency doubling function, thereby increasing the refresh rate supported by the display device 200.

[0069] In some embodiments, for the DLG frequency multiplication function, the middleware layer can be configured with DLG technology software services. Based on the DLG technology software services, the SOC can send control instructions to the TCON, causing the TCON to simultaneously open two rows of gates (Gate poles) instead of scanning row by row, reducing the time consumption of the display drive signal, thereby improving the refresh rate of the display device 200. As shown in Figure 8, under the DLG technology, dual-row scanning is performed, scanning two rows of pixels at a time, and the content of the two rows is the same, that is, G1 = G2. However, this will reduce the amount of information in the input signal by half, resulting in a decrease in the clarity of the playback image.

[0070] To reduce the loss of clarity caused by the frequency doubling function, in some embodiments, the HSR frequency doubling function achieves differential display through timing adjustment. As shown in Figure 9, under HSR technology, only the pixels of odd or even rows are scanned, and the other row incorporates information from 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 achieved by HSR technology can improve the problem of reduced clarity caused by the reduction in information volume while increasing the refresh rate.

[0071] Based on the above-mentioned frequency doubling function, the display device 200 can improve the refresh rate it can support by reducing the time TCON takes to scan pixels. For example, a display device that supports 120Hz in hardware can increase the output frequency doubling signal to 240Hz through the frequency doubling function. However, some device interfaces 240 can also support input signals with higher refresh rates. In some embodiments of the present application, only the HDMI interface is used as an example for illustration, and other types of device interfaces also have this function, which will not be described here. The HDMI interface can also refresh signals with high refresh rates such as 144Hz. Accordingly, by configuring the hardware settings of the display device 200, the display device 200 hardware can support refresh rates of 120Hz and 144Hz at the same time.

[0072] Similarly, when the display device 200 supports a refresh rate of 144Hz in hardware, the refresh rate supported by the display device 200 can be increased to 288Hz based on the frequency doubling function. In this way, based on the frequency doubling function of the above-mentioned hardware and software, the display device 200 can achieve outputs with different refresh rates, such as 120Hz, 144Hz, 240Hz and 288Hz. However, since different refresh rates have different characteristics, when the refresh rate of the input signal connected to HDMI changes, the display device 200 is prone to display failures caused by data inconsistency (such as inconsistent screen refresh rates) or uneven pictures (such as garbage that occurs when TCON switches the frequency doubling technology), affecting the display effect of the display device 200 when the refresh rate is switched.

[0073] Based on the above application scenarios, in order to improve the problem of poor display effect when switching different refresh rates, a display device 200 provided according to some embodiments of the present application, as shown in Figure 10, may include a display 260, a device interface 240, a memory, a first processor 251 and a second processor 252. Among them, the display 260 can be configured to display the playback screen of the drive signal. The memory can be configured to store computer programs. The device interface 240 can be configured to connect external devices and receive input signals sent by external devices. For example, an external device such as a set-top box or a game console is connected via an HDMI interface, and input signals sent by devices such as a set-top box or a game console are received based on the HDMI interface.

[0074] In some embodiments, the refresh rate of the input signal may be one of a first refresh rate, a second refresh rate, a third refresh rate, and a fourth refresh rate, wherein the second refresh rate is greater than the first refresh rate, the third refresh rate may be twice the first refresh rate, and the fourth refresh rate may be twice the second refresh rate. For example, the first refresh rate is 120 Hz, the second refresh rate is 144 Hz, the third refresh rate is 240 Hz, and the fourth refresh rate is 288 Hz.

[0075] In some embodiments, the first processor 251 may be configured to control the display process of the display 260, which may be the TCON provided in the above embodiment. The first processor 251 may be configured to execute the aforementioned computer program to enable the display device to perform the following program steps:

[0076] S1004: In response to the refresh rate setting instruction, convert the input signal into a driving signal suitable for the display according to display screen parameters, and send the driving signal to the display.

[0077] The display screen parameter may be one of a first screen parameter, a second screen parameter, a third screen parameter, and a fourth screen parameter. The first screen corresponds to the first refresh rate, the second screen corresponds to the second refresh rate, the third screen corresponds to the third refresh rate, and the fourth screen corresponds to the fourth refresh rate.

[0078] In some embodiments, the third screen is associated with the on-state of the third refresh rate multiplier switch, and the fourth screen is associated with the on-state of the fourth refresh rate multiplier switch. The on-state of the third refresh rate multiplier switch is used to enable the multiplication function of the third refresh rate, and the on-state of the fourth refresh rate multiplier switch is used to enable the multiplication function of the fourth refresh rate. Correspondingly, the off-state of the third refresh rate multiplier switch is used to disable the multiplication function of the third refresh rate, and the off-state of the fourth refresh rate multiplier switch is used to disable the multiplication function of the fourth refresh rate.

[0079] Under the first screen parameter, the first processor 251 can be configured to execute a computer program so that the display device 200 can convert the input signal into a driving signal of a first refresh rate; under the second screen parameter, the first processor 251 can be configured to execute a computer program so that the display device 200 can convert the input signal into a driving signal of a second refresh rate; under the third screen parameter, the first processor 251 can be configured to execute a computer program so that the display device 200 can convert the input signal into a driving signal of a third refresh rate based on a frequency doubling function; under the fourth screen parameter, the first processor 251 can be configured to execute a computer program so that the display device 200 can convert the input signal into a driving signal of a fourth refresh rate based on a frequency doubling function.

[0080] For ease of description, some embodiments of the present application illustrate an example in which a display device 200 implements a frequency doubling function based on HSR technology, with a first refresh rate of 120 Hz, a second refresh rate of 144 Hz, a third refresh rate of 240 Hz, and a fourth refresh rate of 288 Hz. However, this is not intended to limit the frequency doubling function to other technologies, and the refresh rates may be other refresh rates, as long as the above correspondence is satisfied. For example, the first refresh rate may be 50 Hz, the second refresh rate may be 60 Hz; accordingly, the third refresh rate may be 100 Hz, and the fourth refresh rate may be 120 Hz.

[0081] That is, the first screen parameter is the 120Hz screen parameter, the second screen parameter is the 144Hz screen parameter, the third screen parameter is the 240Hz screen parameter, and the fourth screen parameter is the 288Hz screen parameter. The third refresh rate multiplication switch is the 240Hz HSR switch, and the fourth refresh rate multiplication switch is the 288Hz HSR switch. When the 240Hz HSR is on, the 240Hz HSR function is activated, causing TCON to output a 240Hz drive signal; similarly, when the 288Hz HSR is on, the 288Hz HSR function is activated, causing TCON to output a 288Hz drive signal. Therefore, the 240Hz screen parameter is associated with the on state of the 240Hz HSR, and the 288Hz screen parameter is associated with the on state of the 288Hz HSR. The 120Hz screen parameters are screen parameters for displaying 120Hz drive signals, the 144Hz screen parameters are screen parameters for displaying 144Hz drive signals, the 240Hz screen parameters are screen parameters for displaying 240Hz drive signals, and the 288Hz screen parameters are screen parameters for displaying 288Hz drive signals.

[0082] It is worth noting that the TCON can convert a 240Hz drive signal based on the 240Hz HSR function only when the input signal is 120Hz or 240Hz; similarly, the TCON can convert a 288Hz drive signal based on the 288Hz HSR function only when the input signal is 240Hz or 288Hz.

[0083] As shown in Figure 11, when the refresh rate of the input signal is 120Hz or 240Hz and the HSR switch is in the off state, the HSR function is disabled, the driving signal output by TCON remains unchanged at 120Hz, and the display 260 can display the playback picture of the driving signal at 120Hz; when the refresh rate of the input signal is 120Hz or 240Hz and the HSR switch is in the on state, the HSR function is enabled, the driving signal output by TCON is increased to 240Hz, and the display 260 can display the playback picture of the driving signal at 240Hz.

[0084] The refresh rate of the input signal is 144Hz or 288Hz. When the HSR switch is in the off state, the HSR function is disabled, the driving signal output by TCON remains unchanged at 144Hz, and the display 260 can display the playback picture of the driving signal at 144Hz; the refresh rate of the input signal is 144Hz or 288Hz. When the HSR switch is in the on state, the HSR function is enabled, the driving signal output by TCON is increased to 288Hz, and the display 260 can display the playback picture of the driving signal at 288Hz.

[0085] If the refresh rate of the input signal is 240Hz, the display device needs the 240Hz HSR function to achieve frequency doubling. Therefore, the 240Hz HSR switch must be turned on. Only when the HSR function is enabled can the TCON output a 240Hz drive signal, allowing the display 260 to display the playback image of the drive signal at 240Hz.

[0086] Similarly, when the input signal refresh rate is 288Hz, if the display device requires the 288Hz HSR function to achieve frequency doubling, the 288Hz HSR switch must be turned on. Only when the HSR function is enabled can the TCON output a 288Hz drive signal, allowing the display 260 to display the playback image of the drive signal at 288Hz.

[0087] It should be noted that the on states of the 240Hz HSR switch and the 288Hz HSR switch are mutually exclusive, that is, the two switches cannot be turned on at the same time, and the display device cannot enable the 240Hz and 288Hz frequency multiplication functions at the same time. In some embodiments, the second processor 252 can be configured to execute a computer program to enable the display device to set the third refresh rate multiplication switch (240Hz HSR) to the on state and the fourth refresh rate multiplication switch (288Hz HSR) to the off state; similarly, when the fourth refresh rate multiplication switch (288Hz HSR) is set to the on state, the third refresh rate multiplication switch (240Hz HSR) can be set to the off state.

[0088] Based on the above display screen parameters, the refresh rate of the input signal, and the frequency multiplication function, in order to adapt to the scenario of switching between different refresh rates, the second processor 252 of the display device can be configured to execute the aforementioned computer program to enable the display device to perform the following program steps:

[0089] S1001: In response to a refresh rate change event of an input signal, performing blackout on a playback image.

[0090] After the display device is connected to an external device via the HDMI interface, the external device and the display device can interact based on the HDMI interface (as shown in Figure 7). After verification, the external device can send pixel data as an input signal to the display device via the TMDS data channel (S1001'), and simultaneously send the clock signal of the input signal to the display device 200 via the TMDS clock channel. The pixel data can be used to present the playback image, and the clock signal can be used to determine the refresh rate of the input signal; the refresh rate of the input signal can be one of 120Hz, 144Hz, 240Hz, and 288Hz.

[0091] When the refresh rate of the input signal changes, the clock signal sent by the external device will also change. When the display device 200 detects the clock signal change, it can generate an input signal refresh rate change event (S1001"). For the sake of description, the refresh rate of the input signal before the change may be referred to as the initial refresh rate, and the refresh rate of the input signal after the change may be referred to as the target refresh rate. That is, the refresh rate change event is a change event from the initial refresh rate to the target refresh rate.

[0092] It is understood that the initial refresh rate can be one of 120Hz, 144Hz, 240Hz and 288Hz, and the target refresh rate can also be one of 120Hz, 144Hz, 240Hz and 288Hz. However, it should be noted that the initial refresh rate and the target refresh rate cannot be the same refresh rate.

[0093] Due to performance limitations, some display devices do not support variable refresh rate functions, such as variable refresh rate (VRR) technology and free response synchronization technology (FreeSync), when outputting 240Hz and 288Hz drive signals. Therefore, in some embodiments, when the 240Hz HSR switch is on, if the variable refresh rate switch is on, the SOC of the display device 200 may set the variable refresh rate switch to the off state; if the variable refresh rate switch is off, the current variable refresh rate switch is kept off. Among them, the on state of the variable refresh rate can be used to start the variable refresh rate function, and the off state of the variable refresh rate switch can be used to disable the variable refresh rate function.

[0094] Similarly, when the 288Hz HSR switch is on, if the variable refresh rate switch is on, the SOC of the display device can set the variable refresh rate switch to off; if the variable refresh rate switch is off, the current variable refresh rate switch is kept off so that the TCON can normally output a 240Hz or 288Hz drive signal.

[0095] Because the HSR function removes half of the pixel information on the playback screen every other line, this process may cause garbage, affecting the display quality of the playback screen. Therefore, some embodiments of the present application perform black masking on the playback screen when the refresh rate of the input signal changes to block the garbage and improve the display quality of the playback screen.

[0096] In some embodiments, when the display device performs blackout on the playback screen, the second processor 252 can be configured to execute a computer program to enable the display device to send a stretching instruction to the first processor 251 through the second processor 252, so that the first processor 251 performs stretching on the pixel points based on the frequency doubling function. In some embodiments, the display device 200 can send a stretching instruction through the middleware TCON of the HSR based on the SOC, so that the TCON first performs pixel stretching. In this way, the blackout function of the TCON backend can be used to block and remove the garbage generated when the pixel information is removed. In other embodiments, when the display device 200 performs blackout on the playback screen, the backlight of the display device 200 can also be turned off to achieve a blackout effect on the playback screen. For example, the backlight switch is set to the off state, and the off state of the backlight function switch is used to disable the backlight function.

[0097] In some embodiments, since the local dimming function affects the blackout effect, the local dimming function and blackout are mutually exclusive. Therefore, before performing blackout, the display device 200 can also set the backlight adjustment switch to the off state through the second processor 252. The off state of the backlight adjustment switch can be used to disable the backlight adjustment function, and the on state of the backlight adjustment switch can be used to enable the backlight adjustment function.

[0098] Therefore, in some embodiments, when the initial refresh rate is the first refresh rate or the second refresh rate, and the target refresh rate is the third refresh rate or the fourth refresh rate, the display device 200 may further set the backlight adjustment switch to the off state through the second processor 252 before performing blackout on the playback image; and may set the variable refresh rate switch to the off state. That is, when the refresh rate of the input signal switches from 120 Hz to 240 Hz, or when the refresh rate of the input signal switches from 120 Hz to 288 Hz, or when the refresh rate of the input signal switches from 144 Hz to 240 Hz, or when the refresh rate of the input signal switches from 144 Hz to 288 Hz, the SOC turns off the backlight adjustment switch and the variable refresh rate switch.

[0099] S1002: Send a target refresh rate setting instruction to the first processor.

[0100] In some embodiments, after masking the playback image, the display device 200 may also send a target refresh rate setting instruction to the first processor 251, so that the first processor 251 can set the refresh rate of the output drive signal to the target refresh rate in response to the setting instruction. For example, the SOC sends a 120Hz setting instruction to the TCON via the IIC, and the TCON sets the refresh rate of the output drive signal to 120Hz.

[0101] S1003: Setting the display screen parameters based on the target refresh rate so that the first processor converts the input signal into a driving signal of the target refresh rate.

[0102] In some embodiments, after sending a setting instruction to the first processor 251, corresponding display parameters may be set based on the target refresh rate. For example, when the target refresh rate is 120 Hz, the SOC sends a 120 Hz setting instruction to the TCON. Upon receiving the setting instruction, the TCON sets the refresh rate of the drive signal to 120 Hz, and then switches the display parameters to 120 Hz through the SOC.

[0103] It is understood that the second processor 252 is configured to execute a computer program to enable the display device to switch display screen parameters, which may be notified by the first processor, or may be a program step executed by the first processor 251 itself after sending a setting instruction. This application does not impose any restrictions on this.

[0104] However, the TCON of some display devices cannot directly switch screen parameters when switching between 144Hz, 240Hz, and 288Hz refresh rate outputs. For example, when switching from a 144Hz screen parameter to a 240Hz screen parameter, the TCON cannot directly switch from outputting drive signals based on 144Hz screen parameters to outputting drive signals based on 240Hz screen parameters.

[0105] Therefore, in some embodiments, for the aforementioned refresh rate change events where the screen parameters cannot be directly switched, the changed refresh rate can be referred to as the target refresh rate. First, a command to set the first refresh rate is sent to the second processor 252, and the display screen parameters are switched to the first screen parameters. Then, a command to set the target refresh rate is sent to the second processor 252, and the display screen parameters are switched to the screen parameters corresponding to the target refresh rate. In other words, the first screen parameters can be used as intermediate screen parameters. During the switching process, the display screen parameters are first switched to the intermediate screen parameters, and then the screen parameters corresponding to the target refresh rate are switched.

[0106] For example, when the refresh rate of the input signal switches from 240Hz to 288Hz, the SOC disables the local dimming function and then performs black masking on the playback image. The SOC sends a 120Hz setting instruction to the TCON, and then the display parameters are switched to 120Hz based on the SOC. The SOC then sends a 288Hz setting instruction to the TCON, and then the display parameters are switched to 2880Hz based on the SOC.

[0107] Since the input signal of 120Hz or 144Hz can also be multiplied to 240Hz or 288Hz through the HSR function, in some embodiments, when the target refresh rate is 120Hz or 144Hz, the second processor 252 can also be configured to execute a computer program to enable the display device to execute: read the status record of the frequency multiplication switch at the target refresh rate. If the frequency multiplication switch is in the on state at the target refresh rate, the corresponding frequency multiplication switch needs to be set to the on state so that the first processor 251 outputs the driving signal of the refresh rate after multiplication. Among them, the status record can be stored in a database of the display device, such as the aforementioned memory. The status record can be the record data of the default setting of the display device, but can be modified based on the memory used for the previous operation. In some embodiments, under the previous input signal of 120Hz, the user chooses to turn on the 240Hz HSR switch, and the SOC writes the 240Hz HSR to the database as the on state at 120Hz to update the status record.

[0108] For example, when the input signal refresh rate switches to 120Hz, the target refresh rate is 120Hz. The SOC records the status of the 240Hz HSR switch at 120Hz in the database. If the SOC reads that the 240Hz HSR switch is on at 120Hz, it needs to set the 240Hz HSR to on, enabling the 240Hz HSR function so that the TCON can output a 240Hz drive signal. It is worth noting that the 240Hz HSR switch state may vary depending on the initial refresh rate. In this example, if the 240Hz HSR is on, the 240Hz HSR is maintained on; if the 240Hz HSR is off, the 240Hz HSR is switched on.

[0109] S1005: Setting the width and height of the playback image based on display screen parameters.

[0110] In some embodiments, after the refresh rate of the input signal is changed, the second processor 252 may be configured to execute a computer program to cause the display device to send a configuration instruction to the first processor 251 according to the changed refresh rate and to reset the display screen parameters, so that the first processor 251 can convert the input signal according to the new refresh rate and display screen parameters. During this process, the size of the playback screen may change. Therefore, the second processor 252 of the display device may be further configured to execute the aforementioned computer program to cause the display device to reset the width and height of the playback screen, thereby resizing the window size of the display window used to display the playback screen (ApplyWindow).

[0111] Since the input signal of 120Hz or 144Hz can also output a driving signal of 240Hz or 288Hz based on the frequency doubling function, and the output of 240Hz and 288Hz driving signals is mutually exclusive with the variable refresh rate function. Therefore, in some embodiments, when the initial refresh rate is the third refresh rate (240Hz) or the fourth refresh rate (288Hz), and the target refresh rate is the first refresh rate (120Hz) or the second refresh rate (144Hz), before the second processor 252 executes step S1005, it can also be configured to execute the aforementioned computer program to enable the display device to execute: read the status record of the variable refresh rate switch at the target refresh rate. If the variable refresh rate switch is in the on state at the target refresh rate, the variable refresh rate switch can be set to the on state; if the variable refresh rate switch is in the off state at the target refresh rate, the off state of the variable refresh rate switch can be maintained.

[0112] That is, when the input signal switches to a refresh rate of 120Hz or 240Hz, the variable refresh rate switch is determined according to the state record recorded in the database. The state record can be the record data of the default setting of the display device, but can be modified based on the memory of the previous operation.

[0113] S1006: canceling the blackout so that the display can display the playback picture of the driving signal according to the target refresh rate.

[0114] After the first processor 251 and the second processor 252 of the display device 200 execute steps S1001-S1005, the playback image generated by the drive signal output by the first processor 251 can be normally displayed on the display 260, and problems such as display failure and uneven image quality will no longer occur. At this time, the second processor 252 can be configured to execute the aforementioned computer program to cause the display device to execute the following: cancel the blacking of the playback image, so that the display 260 can display the playback image generated by the drive signal at the target refresh rate.

[0115] In some embodiments, after the second processor 252 cancels the blacking of the playback image, it can be further configured to execute the aforementioned computer program to cause the display device to execute: setting the backlight adjustment switch to the on state to enable the backlight adjustment function. The backlight adjustment can have different gears (such as high, medium, and low). When the backlight adjustment switch is set to the on state, the gear of the backlight adjustment switch can be set according to the setting before it was turned off.

[0116] For example, if a user sets the backlight adjustment function to a high setting, the display device 200 can disable the backlight adjustment function through the second processor 252 before performing blackout, and simultaneously write the high setting to the database. Accordingly, after the second processor 252 cancels the blackout, the backlight adjustment setting record can be read from the database, and the backlight adjustment function can be enabled and set to the high setting.

[0117] Based on the above embodiment, the above steps S1001 to S1006 are described below with respect to refresh rate change events in different scenarios.

[0118] Scenario 1: The refresh rate of the input signal switches from the first refresh rate (120Hz) to the fourth refresh rate (288Hz)

[0119] As shown in FIG12 , in some embodiments, when the refresh rate of the input signal switches from 120 Hz to 288 Hz, the initial refresh rate is the first refresh rate (120 Hz) and the target refresh rate is the fourth refresh rate (288 Hz). After the second processor 252 performs blacking on the playback image ( S1201 ′), the state record of the third refresh rate multiplier switch (240 Hz HSR switch) at the first refresh rate can be read ( S1201 ). Based on the state record, the switch state of the third refresh rate multiplier switch (240 Hz HSR) is determined ( S1202 ). If the third refresh rate multiplier switch is in the off state at the first refresh rate, the fourth refresh rate multiplier switch (288 Hz HSR switch) can be set to the on state ( S1203 ). Then, a setting instruction for the fourth refresh rate (288 Hz) can be sent to the first processor 251 (e.g., TCON) ( S1204 ), and the display screen parameters can be set to the fourth screen parameters, i.e., the 288 Hz screen parameters ( S1205 ). The width and height of the display window can be set based on the fourth screen parameter (Apply window) (S1206), and then the blackout is canceled so that the display 260 displays the playback picture of the driving signal at the fourth refresh rate (S1207).

[0120] In other embodiments, when the refresh rate of the input signal is switched from 120 Hz to 288 Hz, if the third refresh rate multiplier switch (240 Hz HSR switch) is on, the second processor 252 may set the third refresh rate multiplier switch to off (S1208), send a setting instruction for the first refresh rate (120 Hz) to the first processor 251 (S1209), and set the display screen parameters to the first screen parameters, i.e., 120 Hz screen parameters (S1210). Under the first screen parameters, steps S1203-S1207 may be executed based on the second processor 252.

[0121] In some embodiments, when the refresh rate of the input signal switches from 120 Hz to 288 Hz, the second processor 252, after performing blackout, further sets the backlight adjustment switch (local dimming switch) to an off state and the variable refresh rate switch (VRR switch) to an off state to disable the VRR and FreeSync functions (indicated by a dashed box in S1201'). In some embodiments, before canceling blackout, backlight adjustment (local dimming) may also be enabled (indicated by a dashed box in S1207).

[0122] Scenario 2: The refresh rate of the input signal switches from the third refresh rate (240Hz) to the fourth refresh rate (288Hz)

[0123] As shown in FIG13 , in some embodiments, when the refresh rate of the input signal switches from 240 Hz to 288 Hz, the initial refresh rate is the third refresh rate (240 Hz) and the target refresh rate is the fourth refresh rate (288 Hz). After the second processor 252 performs blacking on the playback image ( S1301 ′), the third refresh rate multiplier switch is set to the off state based on the second processor 252 ( S1301 ). A setting instruction for the first refresh rate (120 Hz) may be sent to the first processor 251 (e.g., TCON) ( S1302 ), and the display screen parameters may be set to the first screen parameters, i.e., 120 Hz screen parameters ( S1303 ). The fourth refresh rate multiplier switch (288 Hz HSR switch) may then be set to the on state ( S1304 ). A setting instruction for the fourth refresh rate (288 Hz) may be sent to the first processor 251 ( S1305 ), and the display screen parameters may be set to the fourth screen parameters, i.e., 288 Hz screen parameters ( S1306 ). The width and height of the display window may be set based on the fourth screen parameter (Apply window) (S1307), and then the blackout may be canceled so that the display 260 displays the playback image of the driving signal at the fourth refresh rate (S1308).

[0124] In some embodiments, when the refresh rate of the input signal switches from 240 Hz to 288 Hz, the second processor 252 may further set the backlight adjustment switch (local dimming switch) to an off state after performing blackout (indicated by a dashed box in S1301'). Since the 240 Hz before the change is also mutually exclusive with the variable refresh rate function, the second processor 252 no longer needs to turn off the variable refresh rate switch. In some embodiments, before canceling blackout, backlight adjustment (local dimming) may also be enabled (indicated by a dashed box in S1308).

[0125] Scenario 3: The refresh rate of the input signal switches from the second refresh rate (144Hz) to the fourth refresh rate (288Hz)

[0126] As shown in FIG14 , in some embodiments, when the refresh rate of the input signal is switched from 144 Hz to 288 Hz ( S1401 ′), the initial refresh rate is the second refresh rate and the target refresh rate is the fourth refresh rate. Before the second processor 252 performs blacking on the playback screen, it can also read the status record of the fourth refresh rate multiplier switch (288 Hz HSR) at the second refresh rate ( S1401 ). Based on the status record, the switch state of the fourth refresh rate multiplier switch (288 Hz HSR) is determined ( S1402 ). If the fourth refresh rate multiplier switch is in the off state at the second refresh rate, the step of performing blacking on the playback screen can be performed ( S1403 ).

[0127] Furthermore, when the refresh rate of the input signal is switched from 144Hz to 288Hz, in some embodiments, if the fourth refresh rate multiplier switch is in the off state at the second refresh rate, after the second processor 252 performs blacking on the playback screen, a setting instruction for the first refresh rate (120hz) can be sent to the first processor 251 (such as TCON) (S1404), and the display screen parameter can be set to the first screen parameter, i.e., the 120Hz screen parameter (S1405). Then, the fourth refresh rate multiplier switch (288Hz HSR switch) can be set to the on state (S1406). A setting instruction for the fourth refresh rate (288Hz) can be sent to the first processor 251 (S1407), and the display screen parameter can be set to the fourth screen parameter, i.e., the 288Hz screen parameter (S1408). The width and height of the display window can be set based on the fourth screen parameter (Applywindow) (S1409), and then the blacking can be canceled so that the display 260 displays the playback screen of the drive signal according to the fourth refresh rate (S1410).

[0128] In some embodiments, when the refresh rate of the input signal is switched from 144 Hz to 288 Hz, if the fourth refresh rate multiplier switch is off at the second refresh rate, the second processor 252 performs blackout on the playback image, and may also set the backlight adjustment switch (local dimming switch) to off, and may set the variable refresh rate switch (VRR switch) to off (indicated by a dashed box in S1403). In some embodiments, before executing the undo blackout, the backlight adjustment (local dimming) may also be turned on (indicated by a dashed box in S1410).

[0129] In other embodiments, if the fourth refresh rate multiplication switch (288 Hz HSR switch) is turned on at the second refresh rate, the fourth refresh rate switch may be kept turned on, and the display screen parameter may be kept at the fourth screen parameter (S1411), so that the first processor 251 converts the input signal into a driving signal at the fourth refresh rate. In this case, the first processor 251 and the second processor 252 do not need to perform any processing.

[0130] Scenario 4: The refresh rate of the input signal switches from the fourth refresh rate (288Hz) to the third refresh rate (240Hz)

[0131] As shown in FIG15 , in some embodiments, when the refresh rate of the input signal is switched from 288 Hz to 240 Hz, the initial refresh rate is the fourth refresh rate (288 Hz) and the target refresh rate is the third refresh rate (240 Hz). After the second processor 252 performs blacking on the playback screen ( S1501 '), the fourth refresh rate multiplier switch (288 Hz HSR switch) can be set to the off state ( S1501 ). Then, a setting instruction for the first refresh rate (120 Hz) can be sent to the first processor 251 (such as TCON) ( S1502 ), and the display screen parameters can be set to the first screen parameters, i.e., 120 Hz screen parameters ( S1503 ). Under the first screen parameters, the third refresh rate multiplier switch (240 Hz HSR switch) can be set to the on state ( S1504 ). A setting instruction for the third refresh rate (240 Hz) can be sent to the first processor 251 ( S1505 ), and the display screen parameters can be set to the third screen parameters, i.e., 240 Hz screen parameters ( S1506 ). The width and height of the playback image can be set based on the third screen parameter (Apply window) (S1507). The blackout is canceled so that the display 260 displays the playback image of the driving signal at the third refresh rate (S1508).

[0132] In some embodiments, when the refresh rate of the input signal is switched from 288 Hz to 240 Hz, the second processor 252 may further set the backlight adjustment switch (local dimming switch) to an off state after performing blackout (indicated by a dashed box in S1501'). Since the 288 Hz before the change is also mutually exclusive with the variable refresh rate function, the second processor 252 no longer needs to turn off the variable refresh rate switch (VRR switch). In some embodiments, before canceling blackout, backlight adjustment (local dimming) may also be enabled (indicated by a dashed box in S1508).

[0133] Scenario 5: The refresh rate of the input signal switches from the fourth refresh rate (288Hz) to the first refresh rate (120Hz)

[0134] As shown in Figure 16, in some embodiments, when the refresh rate of the input signal is switched from 288Hz to 120Hz, the initial refresh rate is the fourth refresh rate (288Hz) and the target refresh rate is the first refresh rate (120Hz). After the second processor 252 performs blacking on the playback screen (S1601'), the fourth refresh rate multiplier switch (288Hz HSR switch) can be set to the off state (S1601). The status record of the third refresh rate multiplier switch (240Hz HSR switch) at the first refresh rate can be read (S1602). The switch state of the third refresh rate multiplier is determined based on the status record (S1603). If the third refresh rate multiplier switch is in the on state at the first refresh rate, the second processor 252 can send a setting instruction for the first refresh rate (120Hz) to the first processor 251 (S1604), and the display screen parameters can be set to the first screen parameters, i.e., 120Hz screen parameters (S1605). Under the first screen parameter, the third refresh rate multiplier switch (240Hz HSR switch) can be set to the on state (S1606). A setting instruction for the third refresh rate (240Hz) can be sent to the first processor 251 (S1607), and the display screen parameter can be set to the third screen parameter, that is, the 240Hz screen parameter (S1608). Based on the third screen parameter, the width and height of the playback screen can be set (Apply window) (S1609). Cancel the blackout so that the display 260 displays the playback screen of the drive signal at the third refresh rate (S1610). In this embodiment, the refresh rate of the input signal is 120Hz, but the refresh rate of the drive signal output by the first processor 251 is multiplied to 240Hz.

[0135] In other embodiments, when the refresh rate of the input signal is switched from 288 Hz to 120 Hz, if the third refresh rate multiplier switch is off at the first refresh rate, the second processor 252 may send a setting instruction for the first refresh rate (120 Hz) to the first processor 251 (S1611). The display screen parameters may be switched to the first screen parameters, i.e., 120 Hz screen parameters (S1612). The width and height of the playback screen may be set based on the first screen parameters. The masking is then canceled so that the display 260 displays the playback screen of the drive signal at the first refresh rate (S1609-S1610).

[0136] In some embodiments, when the refresh rate of the input signal is switched from 288Hz to 120Hz, the second processor 252 performs blacking on the playback screen, and then the backlight adjustment switch (local dimming switch) can be set to the off state (shown in a dotted box in S1601'), and the variable refresh rate switch (VRR switch) can also be set to the off state. After the second processor 252 sets the display screen parameter to the first screen parameter (i.e., the 120Hz screen parameter), the second processor 252 also reads the status record of the variable refresh rate switch (VRR switch) at the first refresh rate (S1613). Determine whether the state of the variable refresh rate switch (VRR switch) is on (S1614). If the variable refresh rate switch is on at the first refresh rate, the variable refresh rate switch can be set to on, such as turning on VRR and FreeSync (S1615); otherwise, that is, if the variable refresh rate switch is off at the first refresh rate, no processing is performed.

[0137] In some embodiments, before canceling the blackout, backlight adjustment (local dimming) may be enabled (shown in a dotted box in S1610 ).

[0138] Scenario 6: The refresh rate of the input signal switches from the fourth refresh rate (288Hz) to the second refresh rate (144Hz)

[0139] As shown in FIG17 , in some embodiments, when the refresh rate of the input signal is switched from 288 Hz to 144 Hz ( S1701 ′), the initial refresh rate is the fourth refresh rate (288 Hz) and the target refresh rate is the second refresh rate (144 Hz). Before the second processor 252 performs blacking on the playback image, it can read the status record of the fourth refresh rate multiplier switch (288 Hz HSR) at the second refresh rate ( S1701 ). Based on the status record, the switch state of the fourth refresh rate multiplier switch (288 Hz HSR) is determined ( S1702 ). If the fourth refresh rate multiplier switch is in the off state at the second refresh rate, the step of performing blacking on the playback image is performed, i.e., S1703 .

[0140] In some embodiments, when the refresh rate of the input signal is switched from 288Hz to 144Hz, if the fourth refresh rate multiplier switch is in the off state at the second refresh rate, the second processor 252 can set the fourth refresh rate multiplier switch to the off state after blacking out the playback screen (S1704). Then, a setting instruction for the first refresh rate can be sent to the first processor 251 (S1705). The display screen parameter can be set to the first screen parameter, i.e., the 120Hz screen parameter (S1706). Since the 144Hz screen parameter signal switching is automatically switched by the bottom layer after the signal is recognized, under the first screen parameter, the second processor 252 can also reset the hot plug detection of the device interface 240, i.e., pull the HPD again (S1707). A setting instruction for the second refresh rate (144Hz) can be sent to the first processor 251 (S1708), and then the display screen parameter can be set to the second screen parameter, i.e., the 144Hz screen parameter (S1709). Based on the second screen parameter, the width and height of the playback screen can be set (Apply window) (S1712). The masking is canceled so that the display 260 displays the playback image of the driving signal at the second refresh rate (S1713).

[0141] In some embodiments, when the refresh rate of the input signal is switched from 288Hz to 144Hz, the second processor 252 performs blacking on the playback screen, and then the backlight adjustment switch (local dimming switch) can be set to the off state (shown in a dotted box in S1703), and the variable refresh rate switch (vrr switch) can also be set to the off state. After the second processor 252 sets the display screen parameters to the second screen parameters, the second processor 252 can also read the status record of the variable refresh rate switch (vrr switch) at the second refresh rate (S1715). Determine whether the state of the variable refresh rate switch (vrr switch) is on (S1716). If the variable refresh rate switch is on at the second refresh rate, the variable refresh rate switch (vrr switch) can be set to on, such as turning on vrr and freesync (S1717); otherwise, that is, if the variable refresh rate switch is off at the second refresh rate, no processing is performed.

[0142] In other embodiments, if the fourth refresh rate multiplication switch is turned on at the second refresh rate, this indicates that before the refresh rate change, the first processor 251 has already output a drive signal at the fourth refresh rate based on the multiplication function, and the display screen parameters of the display device 200 are also the fourth screen parameters. Therefore, at this time, the second processor 252 maintains the fourth refresh rate switch on and maintains the display screen parameters at the fourth screen parameters, so that the first processor 251 converts the input signal into a drive signal at the fourth refresh rate (S1714). At this time, the first processor 251 and the second processor 252 do not need to perform any processing.

[0143] In some embodiments, before executing the undo blackout operation, backlight adjustment (local dimming) may be enabled (shown in a dotted box in S1713 ).

[0144] It is understandable that some or all of the switches corresponding to the above-mentioned functions may correspond to switch controls visible in the view. For example, the switch for the frequency doubling function when the input signal is 240Hz is shown in Figure 18, and the 288Hz HSR switch can only be interactive when the input signal is 144Hz or 288Hz; otherwise, the 288Hz HSR is grayed out and cannot be interacted with. Of course, some or all of the switches corresponding to the various functions may not be provided with visible switch controls. When disabling a function, the second processor 252 may do so by modifying the parameters in the data object. This application does not impose any restrictions on this.

[0145] Based on the above-mentioned display device, some embodiments of the present application also provide a high refresh signal display method for a display device, as shown in FIG10 . The method may include but is not limited to steps S1001 to S1006 . Please refer to the above description for details, which will not be repeated here.

[0146] It can be seen from the above scheme that according to the display device and the high refresh signal display method for the display device provided in some embodiments of the present application, the playback screen can be masked in response to the refresh rate change event of the input signal. The refresh rate change event can be a change event from the initial refresh rate to the target refresh rate. Then, a target refresh rate setting instruction can be sent to the first processor, and the display screen parameters can be set based on the target refresh rate, so that the first processor can convert the input signal into a drive signal of the target refresh rate. The width and height of the playback screen can be set based on the display screen parameters. The masking can be revoked so that the display can display the playback screen of the drive signal at the target refresh rate. In this way, the refresh rate and the display screen parameters of the display device are set according to the refresh rate change event of the input signal, and the playback screen is masked before the display screen parameters are set, which can improve the display effect of the display device when switching between different refresh rate signals.

[0147] It should be noted that the high refresh rate signal in some embodiments of the present application refers to a signal with a refresh rate higher than the refresh rate supported by the display. For example, the above-mentioned 144 Hz, 240 Hz and 288 Hz can all be called high refresh rate signals.

[0148] The same and similar parts between the various embodiments in this specification can be referenced to each other and will not be repeated here.

[0149] Those skilled in the art will clearly understand that the technology in some embodiments of the present application can be implemented by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the solutions in some embodiments of the present application, or the parts that contribute to the relevant technology, can be embodied in the form of a computer software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and can include a number of instructions for enabling 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 application or certain parts of the embodiments.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding solutions from the scope of the embodiments of the present application.

[0151] For ease of explanation, the above description has been made with reference to specific embodiments. However, the above discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, so that those skilled in the art can better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, comprising: a display configured to display a playback image of the driving signal; a device interface configured to connect to an external device and receive an input signal sent by the external device; a memory configured to store a computer program; A processor is connected to the display, the device interface and the memory, and includes a first processor and a second processor, wherein the first processor is configured to execute the computer program to cause the display device to perform: In response to a refresh rate setting instruction, converting the input signal into a drive signal suitable for the display according to display screen parameters, and sending the drive signal to the display; The second processor is configured to execute the computer program to enable the display device to perform: In response to a refresh rate change event of the input signal, masking the playback image; The refresh rate change event is a change event from the initial refresh rate to the target refresh rate; sending a setting instruction of the target refresh rate to the first processor; Setting the display screen parameters based on the target refresh rate so that the first processor converts the input signal into a driving signal of the target refresh rate; Setting the width and height of the playback image based on the display screen parameters; The masking is canceled so that the display displays the playback picture of the driving signal according to the target refresh rate.

2. The display device according to claim 1 , wherein the refresh rate of the input signal is one of a first refresh rate, a second refresh rate, a third refresh rate, and a fourth refresh rate, the second refresh rate is greater than the first refresh rate, the third refresh rate is twice the first refresh rate, and the fourth refresh rate is twice the second refresh rate; The display screen parameter is one of the first screen parameter, the second screen parameter, the third screen parameter and the fourth screen parameter; The first screen participates in the first refresh rate correspondence, the second screen participates in the second refresh rate correspondence, the third screen participates in the third refresh rate correspondence, and the fourth screen participates in the fourth refresh rate correspondence.

3. The display device according to claim 2, wherein when the initial refresh rate is the first refresh rate or the second refresh rate, and the target refresh rate is the third refresh rate or the fourth refresh rate, before the second processor performs blacking on the playback image, the second processor is further configured to execute the computer program to cause the display device to perform: Setting the backlight adjustment switch to an off state, wherein the off state of the backlight adjustment switch is used to disable the backlight adjustment function; The variable refresh rate switch is set to an off state, where the off state of the variable refresh rate switch is used to disable the variable refresh rate function.

4. The display device according to claim 3, wherein after the second processor executes the canceling of the blackout, the second processor is further configured to execute the computer program to cause the display device to execute: The backlight adjustment switch is set to an on state, and the on state of the backlight adjustment switch is used to enable a backlight adjustment function.

5. The display device according to claim 2, wherein the third screen is associated with the on-state of a third refresh rate multiplier switch, and the fourth screen is associated with the on-state of a fourth refresh rate multiplier switch; The on state of the third refresh rate multiplying switch is used to enable the multiplying function of the third refresh rate, and the on state of the fourth refresh rate multiplying switch is used to enable the multiplying function of the fourth refresh rate; Under the first screen parameters, the first processor is configured to execute the computer program to enable the display device to: convert the input signal into a driving signal of the first refresh rate; Under the second screen parameters, the first processor is configured to execute the computer program to enable the display device to: convert the input signal into a driving signal of the second refresh rate; Under the third screen parameter, the first processor is configured to execute the computer program to enable the display device to: convert the input signal into a driving signal of the third refresh rate based on the frequency multiplication function; Under the fourth screen parameter, the first processor is configured to execute the computer program to enable the display device to perform: converting the input signal into a driving signal of the fourth refresh rate based on the frequency doubling function.

6. The display device according to claim 5, wherein when the initial refresh rate is the third refresh rate or the fourth refresh rate, and the target refresh rate is the first refresh rate or the second refresh rate, before the second processor sets the width and height of the display window based on the display screen parameters, the second processor is further configured to execute the computer program to cause the display device to execute: Reading a state record of the variable refresh rate switch at the target refresh rate; If the variable refresh rate switch is in an on state at the target refresh rate, setting the variable refresh rate switch to an on state, wherein the on state of the variable refresh rate switch is used to enable a variable refresh rate function; If the variable refresh rate switch is in the off state at the target refresh rate, the off state of the variable refresh rate switch is maintained, and the off state of the variable refresh rate switch is used to disable the variable refresh rate function.

7. The display device according to claim 5, wherein when the initial refresh rate is the first refresh rate and the target refresh rate is the fourth refresh rate, after the second processor performs blacking on the playback image, the second processor is further configured to execute the computer program to cause the display device to perform: Reading a state record of the third refresh rate multiplying switch at the first refresh rate; If the third refresh rate multiplier switch is in an off state at the first refresh rate, setting the fourth refresh rate multiplier switch to an on state; sending a setting instruction for the fourth refresh rate to the first processor; Setting the display screen parameter to the fourth screen parameter; Setting the width and height of the playback image based on the fourth screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal at the fourth refresh rate.

8. The display device according to claim 7, wherein if the third refresh rate multiplier switch is on, the second processor is configured to execute the computer program to cause the display device to: Setting the third refresh rate multiplying switch to an off state, wherein the off state of the third refresh rate multiplying switch is used to disable the multiplying function of the third refresh rate; sending a setting instruction for the first refresh rate to the first processor; Setting the display screen parameter to the first screen parameter; Under the first screen parameters, setting the fourth refresh rate multiplier switch to an on state; sending a setting instruction for the fourth refresh rate to the first processor; Setting the display screen parameter to the fourth screen parameter; Setting the width and height of the playback image based on the fourth screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal at the fourth refresh rate.

9. The display device according to claim 5, wherein when the initial refresh rate is the third refresh rate and the target refresh rate is the fourth refresh rate, after the second processor performs blacking on the playback image, the second processor is further configured to execute the computer program to cause the display device to perform: Setting the third refresh rate multiplying switch to an off state, wherein the off state of the third refresh rate multiplying switch is used to disable the multiplying function of the third refresh rate; sending a setting instruction for the first refresh rate to the first processor; Setting the display screen parameter to the first screen parameter; Under the first screen parameters, setting the fourth refresh rate multiplier switch to an on state; sending a setting instruction for the fourth refresh rate to the first processor; Setting the display screen parameter to the fourth screen parameter; Setting the width and height of the playback image based on the fourth screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal at the fourth refresh rate.

10. The display device according to claim 5, wherein when the initial refresh rate is the second refresh rate and the target refresh rate is the fourth refresh rate, the second processor is further configured to execute the computer program to cause the display device to execute: Reading a state record of the fourth refresh rate multiplying switch at the second refresh rate; If the fourth refresh rate multiplication switch is in an off state at the second refresh rate, performing a step of blacking out the playback image; If the fourth refresh rate multiplier switch is in the on state at the second refresh rate, maintain the on state of the fourth refresh rate switch and maintain the display screen parameters as the fourth screen parameters, so that the first processor converts the input signal into a driving signal of the fourth refresh rate.

11. The display device according to claim 10 , wherein if the fourth refresh rate multiplying switch is in an off state at the fourth refresh rate, the second processor is further configured to execute the computer program to cause the display device to: sending a setting instruction for the first refresh rate to the first processor; Setting the display screen parameter to the first screen parameter; Under the first screen parameters, setting the fourth refresh rate multiplier switch to an on state; sending a setting instruction for the fourth refresh rate to the first processor; Setting the display screen parameter to the fourth screen parameter; Setting the width and height of the playback image based on the fourth screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal at the fourth refresh rate.

12. The display device according to claim 2, wherein when the initial refresh rate is the fourth refresh rate and the target refresh rate is the third refresh rate, the second processor, after masking the playback image, is further configured to execute the computer program to cause the display device to: Setting the fourth refresh rate multiplying switch to an off state, wherein the off state of the fourth refresh rate multiplying switch is used to disable the multiplying function of the fourth refresh rate; sending a setting instruction for the first refresh rate to the first processor; Setting the display screen parameter to the first screen parameter; Under the first screen parameters, the third refresh rate multiplication switch is set to the on state.

13. The display device according to claim 12, wherein the second processor is further configured to execute the computer program to cause the display device to: sending a setting instruction for the third refresh rate to the first processor; Setting the display screen parameter to the third screen parameter; Setting the width and height of the playback image based on the third screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal according to the third refresh rate.

14. The display device according to claim 5, wherein when the initial refresh rate is the fourth refresh rate and the target refresh rate is the first refresh rate, the second processor, after masking the playback image, is further configured to execute the computer program to cause the display device to: Setting the fourth refresh rate multiplying switch to an off state, wherein the off state of the fourth refresh rate multiplying switch is used to disable the multiplying function of the fourth refresh rate; Reading a state record of the third refresh rate multiplying switch at the first refresh rate; If the third refresh rate multiplication switch is in an on state at the first refresh rate, sending a setting instruction for the first refresh rate to the first processor; Switching the display screen parameters to the first screen parameters; Under the first screen parameters, setting the third refresh rate multiplier switch to an on state; sending a setting instruction for the third refresh rate to the first processor; Setting the display screen parameter to the third screen parameter; Setting the width and height of the playback image based on the third screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal according to the third refresh rate.

15. The display device according to claim 14 , wherein if the third refresh rate multiplier switch is in an off state at the first refresh rate, the second processor is further configured to execute the computer program to cause the display device to: sending a setting instruction for the first refresh rate to the first processor; Setting the display screen parameter to the first screen parameter; Setting the width and height of the playback image based on the first screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal at the first refresh rate.

16. The display device according to claim 5, wherein when the initial refresh rate is the fourth refresh rate and the target refresh rate is the second refresh rate, the second processor is further configured to execute the computer program to cause the display device to execute: Reading a state record of the fourth refresh rate multiplying switch at the second refresh rate; If the fourth refresh rate multiplication switch is in an off state at the second refresh rate, performing a step of blacking out the playback image; If the fourth refresh rate multiplier switch is in the on state at the second refresh rate, maintain the on state of the fourth refresh rate switch and maintain the display screen parameters as the fourth screen parameters, so that the first processor converts the input signal into a driving signal of the fourth refresh rate.

17. The display device according to claim 16, wherein if the fourth refresh rate multiplying switch is in an off state at the fourth refresh rate, the second processor is further configured to execute the computer program to cause the display device to: Setting the fourth refresh rate multiplying switch to an off state, wherein the off state of the fourth refresh rate multiplying switch is configured to disable the multiplying function of the fourth refresh rate; sending a setting instruction for the first refresh rate to the first processor; Setting the display screen parameter to the first screen parameter; Under the first screen parameters, resetting the hot plug detection of the device interface; sending a setting instruction for the fourth refresh rate to the first processor; Setting the display screen parameter to the fourth screen parameter; Setting the width and height of the playback image based on the fourth screen parameter; The masking is canceled so that the display displays the playback picture of the driving signal at the fourth refresh rate.

18. The display device according to claim 1, wherein the input signal comprises pixels for presenting the playback image; and the second processor performs masking on the playback image, and is further configured to execute the computer program to cause the display device to perform: A stretching instruction is sent to the first processor, so that the first processor performs stretching on the pixel points based on a frequency doubling function.

19. A high refresh rate signal display method for a display device, comprising: In response to a refresh rate change event of an input signal, performing blackout on the playback image; The refresh rate change event is a change event from the initial refresh rate to the target refresh rate; Sending a target refresh rate setting instruction to the first processor; Setting the display screen parameters based on the target refresh rate so that the first processor converts the input signal into a driving signal of the target refresh rate; Setting the width and height of the playback image based on the display screen parameters; The masking is canceled so that the display can display the playback picture of the driving signal according to the target refresh rate.

Images