Display device and high-brush signal display method

Abstract

Some embodiments of the present application provide a display device and a display method of a high-brush signal, which can perform blackening on a playback screen in response to a refresh rate change event of an input signal. Wherein the refresh rate change event is a change event that the initial refresh rate is switched to the target refresh rate. And sending a setting instruction of the target refresh rate to the first controller, and setting the display screen parameter based on the target refresh rate, so that the first controller converts the input signal into a driving signal of the target refresh rate. And setting the width and height of the played picture based on the display screen parameters. And cancelling the black shading to enable the display to display the playing picture of the driving signal according to the target refresh rate. According to the method, the refresh rate of the first controller and the display screen parameter of the display equipment are set according to the refresh rate change event of the input signal, so that the display can display the playing picture according to the changed refresh rate, and the display effect of the display equipment when different refresh rate signals are switched can be improved.

Description

Technical Field

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

[0002] Display devices are intelligent devices that can present user interfaces and support user interaction. For example, smart TVs are based on Internet application technologies, feature open operating systems 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 diverse and personalized user needs.

[0003] 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.

[0004] 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

[0005] The present application provides a display device and a method for displaying a high refresh rate signal to solve the problem of poor display effect when the display device switches between signals with different refresh rates.

[0006] In a first aspect, some embodiments of the present application provide a display device, comprising a display, a device interface, a first controller, and a second controller. The display is configured to display a playback image of a driving signal, and the device interface is configured to connect to an external device and receive an input signal sent by the external device.

[0007] a first controller configured to, in response to a refresh rate setting instruction, convert the input signal into a drive signal suitable for the display according to display screen parameters, and send the drive signal to the display;

[0008] The second controller is configured to perform the following program steps:

[0009] 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 an initial refresh rate to a target refresh rate;

[0010] sending a setting instruction of the target refresh rate to the first controller;

[0011] Setting the display screen parameters based on the target refresh rate so that the first controller converts the input signal into a driving signal of the target refresh rate;

[0012] Setting the width and height of the playback image based on the display screen parameters;

[0013] The masking is canceled so that the display displays the playback picture of the driving signal according to the target refresh rate.

[0014] In a second aspect, some embodiments of the present application further provide a method for displaying a high refresh signal, which is applied to the display device provided in the first aspect, and the method includes:

[0015] 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 an initial refresh rate to a target refresh rate;

[0016] sending a setting instruction of the target refresh rate to the first controller;

[0017] Setting the display screen parameters based on the target refresh rate so that the first controller converts the input signal into a driving signal of the target refresh rate;

[0018] Setting the width and height of the playback image based on the display screen parameters;

[0019] The masking is canceled so that the display displays the playback picture of the driving signal according to the target refresh rate.

[0020] It can be seen from the above technical solutions that some embodiments of the present application provide a display device and a method for displaying a high refresh signal, and the method can perform blackout on the playback screen in response to a refresh rate change event of the input signal. The refresh rate change event is a change event from the initial refresh rate to the target refresh rate. Then, a target refresh rate setting instruction is sent to the first controller, and the display screen parameters are set based on the target refresh rate, so that the first controller converts the input signal into a drive signal of the target refresh rate. The width and height of the playback screen are set based on the display screen parameters. Then, the blackout is canceled so that the display displays the playback screen of the drive signal at the target refresh rate. The method sets the refresh rate of the first controller and the display screen parameters of the display device according to the refresh rate change event of the input signal, and performs blackout on the playback screen before setting the display screen parameters, which can improve the display effect of the display device when switching between signals with different refresh rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a schematic diagram showing usage scenarios of the display device in some embodiments of the present application;

[0023] Figure 2 A hardware configuration block diagram of a control device provided in some embodiments of the present application;

[0024] Figure 3 A hardware configuration block diagram of a display device provided in some embodiments of the present application;

[0025] Figure 4 A schematic diagram of software configuration in a display device provided in some embodiments of the present application;

[0026] Figure 5 A configuration block diagram of a controller provided in some embodiments of the present application;

[0027] Figure 6 A schematic diagram of the structure of a first controller and a second controller provided in some embodiments of the present application;

[0028] Figure 7 Interaction diagram of the HDMI interface provided in some embodiments of the present application;

[0029] Figure 8 A schematic diagram of the DLG frequency multiplication function provided in some embodiments of the present application;

[0030] Figure 9 A schematic diagram of the HSR frequency doubling function provided in some embodiments of the present application;

[0031] Figure 10 A schematic flow chart of a method for displaying a high refresh rate signal on a display device according to some embodiments of the present application;

[0032] Figure 11 A schematic diagram of the relationship between the refresh rate of the input signal and the drive signal provided in some embodiments of the present application;

[0033] Figure 12 A schematic flow chart of a method for displaying a high refresh rate signal in a scenario provided by some embodiments of the present application;

[0034] Figure 13 A schematic flow chart of a high refresh signal display method in another scenario provided by some embodiments of the present application;

[0035] Figure 14 A schematic flow chart of a high refresh signal display method in another scenario provided by some embodiments of the present application;

[0036] Figure 15 A schematic flow chart of a high refresh signal display method in another scenario provided by some embodiments of the present application;

[0037] Figure 16 A schematic flow chart of a high refresh signal display method in another scenario provided by some embodiments of the present application;

[0038] Figure 17 A schematic flow chart of a high refresh signal display method in another scenario provided by some embodiments of the present application;

[0039] Figure 18 This is a schematic diagram of the effect of the frequency doubling function view interface provided in some embodiments of the present application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the exemplary embodiments of the present application clearer, the technical solutions in the exemplary embodiments of the present application will be clearly and completely described below in combination with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0041] Based on the exemplary embodiments shown in this application, all other embodiments obtained by persons of ordinary skill in the art without inventive effort are within the scope of protection of this application. In addition, although the disclosure in this application is presented based on one or several exemplary examples, it should be understood that each aspect of the disclosure can independently constitute a complete technical solution.

[0042] 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.

[0043] 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.

[0044] The display device provided in the embodiments of the present application may have various implementation forms, for example, it may be a television, a smart TV, a laser projection device, a monitor, an electronic whiteboard (electronic bulletin board), an electronic table (electronic table), etc. Figure 1 and Figure 3 This is a specific implementation of the display device of the present application.

[0045] Figure 1 FIG is a schematic diagram of an operation scenario between a display device and a control device according to an embodiment. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100 .

[0046] In some embodiments, the control device 100 may be a remote controller. Communication between the remote controller 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 controller, voice input, control panel input, and the like.

[0047] 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.

[0048] 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.

[0049] 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 directly received through a module for obtaining voice commands configured inside the display device 200, or the user's voice command control can be received through a voice control device set outside the display device 200.

[0050] In some embodiments, the display device 200 also communicates data with the server 400. The display device 200 may be connected to a local area network (LAN), a wireless local area network (WLAN), or other networks. The server 400 may provide various content and interactions to the display device 200. The server 400 may be a single cluster or multiple clusters, and may include one or more types of servers.

[0051] Figure 2 exemplarily shows a block diagram of a configuration of the control device 100 according to an exemplary embodiment. Figure 2 As shown, the control device 100 includes a device controller 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply. The control device 100 can receive user input commands and convert the commands 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.

[0052] like Figure 3 As shown, the display device 200 includes at least one of a tuner and demodulator 210 , a communicator 220 , a detector 230 , a device interface 240 , a controller 250 , a display 260 , an audio output interface 270 , a memory, a power supply, and a communication device interface 280 .

[0053] In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, a RAM, a ROM, and first to nth interfaces for input / output.

[0054] The display 260 includes a display screen component for presenting images, and a driving component for driving image display, a component for receiving image signals output from a controller, and a component for displaying video content, image content, and a menu control interface and a user control UI interface.

[0055] The display 260 may be a liquid crystal display, an OLED display, or a projection display, and may also be a projection device and a projection screen.

[0056] Communicator 220 is a component used to communicate with external devices or servers using various communication protocols. For example, the communicator may include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chip, a near-field communication protocol chip, and an infrared receiver. Display device 200 can use communicator 220 to send and receive control signals and data signals with control device 100 or server 400.

[0057] The communication device interface 280 may be used to receive control signals from the control device 100 (eg, an infrared remote controller, etc.).

[0058] Detector 230 is used to collect signals from the external environment or external interactions. For example, detector 230 includes a light receiver, a sensor for collecting ambient light intensity; or detector 230 includes an image collector, such as a camera, for collecting external environmental scenes, user attributes, or user interaction gestures; or detector 230 includes a sound collector, such as a microphone, for receiving external sounds.

[0059] 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 (CVBS), a USB input interface (USB), an RGB port, etc. It may also be a composite input / output interface formed by multiple of the above interfaces.

[0060] The tuner-demodulator 210 receives broadcast television signals via a wired or wireless reception method, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

[0061] In some embodiments, the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 210 may also be in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0062] Controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. Controller 250 controls 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, controller 250 may perform operations related to the object selected by the user command.

[0063] In some embodiments, the controller 250 includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), RAM (Random Access Memory, RAM), ROM (Read-Only Memory, ROM), a first interface to an nth interface for input / output, a communication bus, etc.

[0064] The user may input a user command through a graphical user interface (GUI) displayed on the display 260, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user may input a user command through a specific voice or gesture, and the user input interface may recognize the voice or gesture through a sensor to receive the user input command.

[0065] A user interface is the medium for interaction and information exchange between an application or operating system and the user. It converts information between its internal form and a user-friendly format. A common user interface is the graphical user interface (GUI), which refers to a graphical user interface related to computer operations. It can be an icon, window, control, or other interface element displayed on an electronic device's display. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0066] Figure 4 Some embodiments of this application provide Figure 1 Schematic diagram of software configuration in the display device. In some embodiments, the system of the display device 200 can be divided into three layers, namely, application layer, middleware layer and hardware layer from top to bottom.

[0067] The application layer mainly includes commonly used applications on the TV and the application framework. Common applications are mainly browser-based applications, such as HTML5 apps, and native apps.

[0068] 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).

[0069] Native apps can support online or offline, message push or local resource access.

[0070] The middleware layer includes various TV protocols, multimedia protocols, and system components. Middleware uses the basic services (functions) provided by system software to connect various parts of the application system or different applications on the network, enabling resource and function sharing.

[0071] The hardware layer primarily includes the Hardware Abstraction Layer (HAL) interface, hardware, and drivers. The HAL interface is a unified interface for all TV chipsets, with each chip implementing its own logic. Drivers primarily include audio drivers, display drivers, Bluetooth drivers, camera drivers, Wi-Fi drivers, USB drivers, HDMI drivers, sensor drivers (such as fingerprint sensors, temperature sensors, and pressure sensors), and power drivers.

[0072] Based on the hardware and software configuration of the display device 200, as shown in FIG. Figure 5 As shown, in some embodiments, the controller 250 includes a first controller 251 and a second controller 252. The first controller 251 is used 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 controller 252 is only used to control the display process of the display 260. For example, the second controller 252 can be composed of a mainboard including a SOC (System on a Chip), and the first controller 251 can be composed of a logic board (TCON board) including a TCON (Timing Controller Chip).

[0073] In some embodiments, the second controller 252 is the main chip of the display device 200, and the first controller 251 is the sub-chip of the display device 200, and the two can exist independently on the main board and the logic board. Figure 6 As shown, the second controller 252 is a SOC, and the first controller 251 is a TCON; the SOC is set on the main board, and the TCON is set on the TCON board. Figure 6 Among them, COF (Chip On Film) is a soft film assembly technology for fixing an integrated circuit (IC) on a flexible circuit board. 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 a source driver board.

[0074] The TCON includes a TCON IC (timing control circuit) and a level shifter IC (level conversion integrated circuit). The motherboard and TCON board are connected via a flexible flat cable (FFC), and the TCON board and S-PCB board are also connected via FFC. The COF includes a chip-on-film (COF) and source driver chips. Each source driver chip is connected to the S-PCB board and display 260 via chip control pins. The chip control pins can be used to drive the gate electrode, turning on the gate electrode row by row or column by column, thereby realizing the scanning function of the TCON board.

[0075] In other embodiments, the first controller 251 can be integrated into the second controller 252. That is, the second controller 252 is a mainboard including a main chip, and the first controller 251 is a sub-chip. The sub-chip is integrated into the mainboard, making it a sub-module of the mainboard. In this case, a circuit board (mainboard) includes at least two chips, namely the main chip and the sub-chip.

[0076] Of course, regardless of whether the first controller 251 and the second controller 252 are two independent chips or integrated into one chip, through the above-mentioned first controller 251 and second controller 252, 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. In this process, the second controller 252 is used to set the display screen parameters of the display device 200 according to the refresh rate of the audio and video signal, including but not limited to the resolution, the number of horizontal and vertical pixels, the refresh rate and other screen parameters; the first controller 251 is used to convert the audio and video signal into a corresponding drive signal at the refresh rate according to the display screen parameters set by the second controller 252, and then send the drive signal to the display 260, so that the display 260 displays the playback screen of the audio and video signal according to the refresh rate. Among them, the drive signal is a signal suitable for display on the display 260. For example, the first controller 251 can convert the received audio and video signal into a drive signal in a format such as a mini-LVDS signal or an RSDS signal.

[0077] For ease of description, in some embodiments of the present application, the first controller 251 is referred to as TCON, the second controller 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.

[0078] 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.

[0079] like Figure 7 As shown, when the device interface 240 is an HDMI interface, in some embodiments, the display device 200 is connected to other external devices through the HDMI input (HDMI in), the display device 200 acts as a sink, and the external device acts as a source. When the external device is connected to the display device 200, the external device pulls up the 5V voltage through the HDMI interface so that the 5V voltage can be applied to the HDMI interface of the display device 200 at the same time. For example, when the external device is connected to the HDMI of the display device 200, the external device can apply the 5V voltage to the display device 200 through the 18th pin (PWR_CON_PIN18) of the HDMI interface, and read the EDID (Extended Display Identification Data) of the display device 200 based on the HDMI interface.

[0080] After detecting a stable 5V voltage signal, the display device 200 prepares the HDCP key and EDID file and pulls up the HPD (Hot Plug Detection) signal. HDCP (High-bandwidth Digital Content Protection) is a content protection technology that encrypts data and verifies authorization. Each device has a pre-set key for verification.

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

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

[0083] 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 then 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.

[0084] In order to meet the needs of high refresh rate scenes such as games, events, and watching movies, in some embodiments, the display device 200 can also Figure 4The middleware layer shown configures specific software services to increase the refresh rate it can support. For example, the display device 200 can configure software services for HSR and DLG technologies in the middleware layer to adjust the way the TCON scans the input signal pixels to achieve frequency doubling, thereby increasing the refresh rate supported by the display device 200.

[0085] In some embodiments, for the DLG frequency doubling function, the middleware layer is configured with a software service of the DLG technology. The SOC sends a control instruction to the TCON based on the software service of the DLG technology, so that the TCON opens two rows of gate poles at the same time instead of scanning line by line, thereby reducing the time consumption of the display driving signal and improving the refresh rate of the display device 200. Figure 8 As shown in FIG, under DLG technology, double-row scanning is performed, scanning two rows of pixels at a time with the same content, that is, G1 = G2. However, the amount of information in the input signal is reduced by half, resulting in a decrease in the clarity of the playback image.

[0086] In order to reduce the loss of clarity caused by the frequency doubling function, in some embodiments, for the HSR frequency doubling function, the difference display is achieved through timing adjustment. Figure 9 As shown in the figure, with HSR technology, only pixels in odd or even rows are scanned, while the other row incorporates information from two adjacent rows. For example, using odd rows as an example, G1 = G1, and G2 = G1 + G3 / 2 (interpolation). This frequency doubling achieved through HSR technology improves the refresh rate while also improving clarity due to reduced information volume.

[0087] 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 the embodiment of the present application, the HDMI interface is used as an example for explanation. The HDMI interface can also support high refresh signals such as 144Hz. Accordingly, by configuring the hardware settings of the display device 200, the display device 200 can support refresh rates of 120Hz and 144Hz at the same time in hardware.

[0088] 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.

[0089] Based on the above application scenarios, in order to improve the problem of poor display effect when switching between different refresh rates, some embodiments of the present application provide a display device 200, such as Figure 10 As shown, the device includes a display 260, a device interface 240, a first controller 251, and a second controller 252. The display 260 is configured to display the playback image of the driving signal. The device interface 240 is configured to connect to an external device and receive input signals sent by the external device. For example, the device interface 240 is connected to an external device such as a set-top box or a game console via an HDMI interface, and receives input signals sent by the device such as the set-top box or the game console based on the HDMI interface.

[0090] 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, wherein 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. 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.

[0091] The first controller 251 is used to control the display process of the display 260, and can be the TCON provided in the above embodiment. The first controller 251 is configured to perform the following program steps:

[0092] 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.

[0093] Among them, the display screen parameter is one of the first screen parameter, the second screen parameter, and the third 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. In some embodiments, the third screen participates in the on-state association of the third refresh rate multiplier switch, and the fourth screen participates in the on-state association 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.

[0094] Under the first screen parameter, the first controller 251 is configured to convert the input signal into a driving signal of a first refresh rate; under the second screen parameter, the first controller 251 is configured to convert the input signal into a driving signal of a second refresh rate; under the third screen parameter, the first controller 251 is configured to 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 controller 251 is configured to convert the input signal into a driving signal of a fourth refresh rate based on a frequency doubling function.

[0095] For ease of description, the present embodiment of the present application illustrates a display device 200 that 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.

[0096] 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 288Hz screen parameter. 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.

[0097] It is worth noting that the TCON can only convert a 240Hz drive signal based on the 240Hz HSR function when the input signal is 120Hz or 240Hz. Similarly, the TCON can only convert a 288Hz drive signal based on the 288Hz HSR function when the input signal is 240Hz or 288Hz.

[0098] That is, Figure 11 As shown, 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 drive signal output by TCON remains unchanged at 120Hz, and the display 260 displays the playback picture of the drive 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 drive signal output by TCON is increased to 240Hz, and the display 260 displays the playback picture of the drive signal at 240Hz.

[0099] 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 drive signal output by TCON remains unchanged at 144Hz, and the display 260 displays the playback picture of the drive 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 drive signal output by TCON is increased to 288Hz, and the display 260 displays the playback picture of the drive signal at 288Hz.

[0100] When the refresh rate of the input signal is 240Hz, the display device 200 requires the 240Hz HSR function to achieve frequency doubling, so the 240Hz HSR switch must be on. Only when the HSR function is enabled can the TCON output a 240Hz drive signal, causing the display 260 to display the playback image of the drive signal at 240Hz.

[0101] Similarly, when the refresh rate of the input signal is 288Hz, the display device 200 requires the 288Hz HSR function to achieve frequency doubling, so the 288Hz HSR switch must be on. Only when the HSR function is enabled can the TCON output a 288Hz drive signal, causing the display 260 to display the playback image of the drive signal at 288Hz.

[0102] 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 200 cannot enable the 240Hz and 288Hz frequency multiplication functions at the same time. In some embodiments, when the second controller 252 sets the third refresh rate frequency multiplication switch (240Hz HSR) to the on state, it sets the fourth refresh rate frequency multiplication switch (288Hz HSR) to the off state; similarly, when the fourth refresh rate frequency multiplication switch (288Hz HSR) is set to the on state, it sets the third refresh rate frequency multiplication switch (240Hz HSR) to the off state.

[0103] Based on the above display 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 controller 250 of the display device 200 is configured to perform the following program steps:

[0104] S1001: In response to a refresh rate change event of an input signal, performing blackout on a playback image.

[0105] After the display device 200 is connected to the external device via the HDMI interface, the external device and the display device 200 interact based on the HDMI interface (e.g. Figure 7 ), after passing verification, the external device sends pixel data for the input signal to the display device 200 via the TMDS data channel, and simultaneously sends a clock signal for the input signal to the display device 200 via the TMDS clock channel. The pixel data is used to present the playback image, and the clock signal is 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.

[0106] When the refresh rate of the input signal changes, the clock signal sent by the external device also changes. When the display device 200 detects the clock signal change, it generates an input signal refresh rate change event. For ease of description, in this embodiment of the application, the refresh rate of the input signal before the change is referred to as the initial refresh rate, and the refresh rate of the input signal after the change is referred to as the target refresh rate. In other words, a refresh rate change event is a change event from the initial refresh rate to the target refresh rate.

[0107] 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 must be ensured that the initial refresh rate and the target refresh rate are not the same refresh rate.

[0108] Due to performance limitations, some display devices 200 do not support variable refresh rate functions, such as VRR and 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 sets the variable refresh rate switch to the off state; if the variable refresh rate switch is off, the current off state of the variable refresh rate switch is maintained. The on state of the variable refresh rate is used to enable the variable refresh rate function, and the off state of the variable refresh rate switch is used to disable the variable refresh rate function.

[0109] Similarly, when the 288Hz HSR switch is in the on state, if the variable refresh rate switch is in the on state, the SOC of the display device 200 sets the variable refresh rate switch to the off state; if the variable refresh rate switch is in the off state, the current variable refresh rate switch is kept in the off state so that the TCON can normally output a 240Hz or 288Hz drive signal.

[0110] 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, in this embodiment of the application, when the refresh rate of the input signal changes, the playback screen is masked to block the garbage and improve the display quality of the playback screen.

[0111] In some embodiments, when the display device 200 performs blackout masking on the playback image, the second controller 252 sends a stretching instruction to the first controller 251, causing the first controller 251 to perform pixel stretching based on the frequency doubling function. For example, the display device 200 can send the stretching instruction via the HSR middleware TCON based on the SOC, causing the TCON to perform pixel stretching first. This allows the blackout masking function on the TCON backend to mask out garbage generated when removing pixel information.

[0112] Alternatively, in other embodiments, when the display device 200 performs blacking out of the playback image, the backlight of the display device 200 may be turned off to achieve a blacking-out effect on the playback image. For example, the backlight switch may be set to an off state, and the off state of the backlight function switch is used to disable the backlight function.

[0113] 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 second controller 252 of the display device 200 also sets the backlight adjustment switch to the off state. The off state of the backlight adjustment switch is used to disable the backlight adjustment function, and the on state of the backlight adjustment switch is used to enable the backlight adjustment function.

[0114] 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 second controller 252 sets the backlight adjustment switch to the off state and the variable refresh rate switch to the off state before performing blackout on the playback image. That is, when the refresh rate of the input signal switches from 120Hz to 240Hz, or when the refresh rate of the input signal switches from 120Hz to 288Hz, or when the refresh rate of the input signal switches from 144Hz to 240Hz, or when the refresh rate of the input signal switches from 144Hz to 288Hz, the SOC turns off the backlight adjustment switch and the variable refresh rate switch.

[0115] S1002: Sending a target refresh rate setting instruction to the first controller.

[0116] After blacking out the playback image, the second controller 252 sends a target refresh rate setting instruction to the first controller 251, so that the first controller 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.

[0117] S1003: Setting the display screen parameters based on the target refresh rate so that the first controller converts the input signal into a driving signal of the target refresh rate.

[0118] After the second controller 250 sends a setting instruction to the first controller 251, it sets the corresponding display parameters based on the target refresh rate. For example, if the target refresh rate is 120Hz, the SOC sends a 120Hz setting instruction to the TCON. Upon receiving the setting instruction, the TCON sets the refresh rate of the drive signal to 120Hz, and then switches the display parameters to 120Hz through the SOC.

[0119] It is understandable that the second controller 252 may be notified by the first controller when switching the display screen parameters, or the first controller 251 may automatically execute a program step after sending a setting instruction. This application does not impose any restrictions on this.

[0120] However, the TCON of some display devices 200 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 the 144Hz screen parameter to outputting drive signals based on the 240Hz screen parameter.

[0121] Therefore, in some embodiments, for the aforementioned refresh rate change events where screen parameters cannot be directly switched, the changed refresh rate is referred to as the target refresh rate. The first controller 251 first sends a first refresh rate setting instruction to the second controller 252, which switches the display screen parameters to the first screen parameters. It then sends a target refresh rate setting instruction to the second controller 252, which switches the display screen parameters to the screen parameters corresponding to the target refresh rate. In other words, the first screen parameters are used as intermediate state parameters. During the switching process, the display screen parameters are first switched to the intermediate state parameters, and then the screen parameters corresponding to the target refresh rate are switched.

[0122] 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.

[0123] 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 controller 252 also reads 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 controller 251 outputs the driving signal of the refresh rate after multiplication. Among them, the status record can be stored in the database of the display device 200. The status record can be the record data of the default setting of the display device 200, but can be modified based on the memory of the previous operation. For example, under the previous input signal of 120Hz, the user chooses to turn on the 240HzHSR switch, and the SOC writes the 240Hz HSR to the database as the on state at 120Hz to update the status record.

[0124] 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.

[0125] S1005: Setting the width and height of the playback image based on display screen parameters.

[0126] After the refresh rate of the input signal is changed, the second controller 252 sends a setting instruction to the first controller 251 according to the changed refresh rate and resets the display parameters, causing the first controller 251 to convert the input signal according to the new refresh rate and display parameters. During this process, the size of the playback image may change, so the second controller 252 of the display device 200 needs to reset the width and height of the playback image, that is, reset the window size of the display window used to display the playback image (ApplyWindow).

[0127] 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), the second controller 252 also reads the status record of the variable refresh rate switch at the target refresh rate before executing step S1005. If the variable refresh rate switch is on at the target refresh rate, the variable refresh rate switch is set to on; if the variable refresh rate switch is off at the target refresh rate, the variable refresh rate switch is maintained in the off state.

[0128] That is, when the input signal switches to a refresh rate of 120 Hz or 240 Hz, the variable refresh rate switch is determined according to the state record recorded in the database. The state record may be the default setting of the display device 200, but may be modified based on the memory of the previous operation.

[0129] S1006: canceling the blackout so that the display can display the playback picture of the driving signal according to the target refresh rate.

[0130] After the first controller 251 and the second controller 252 of the display device 200 execute steps S1001-S1005, the playback image generated by the drive signal output by the first controller 251 can be displayed normally on the display 260 without any display failure or uneven image quality. At this point, the second controller 252 can remove the blackout of the playback image, allowing the display 260 to display the playback image generated by the drive signal at the target refresh rate.

[0131] In some embodiments, after the second controller 252 unmasks the playback screen, it sets the backlight adjustment switch to the on state to enable the backlight adjustment function. The backlight adjustment function may have different gears (e.g., high, medium, and low). When the second controller 252 sets the backlight adjustment switch to the on state, it may set the gear of the backlight adjustment switch according to the setting before it was turned off.

[0132] For example, if a user sets the backlight adjustment function to a high setting, the display device 200 disables the backlight adjustment function through the second controller 252 before performing blackout, and simultaneously writes the high setting to the database. Accordingly, after the second controller 252 cancels the blackout, the backlight adjustment level record is read from the database, the backlight adjustment function is enabled, and the high setting is set.

[0133] Based on the above embodiment, the above steps S1001 to S1006 are described below with respect to refresh rate change events in different scenarios.

[0134] Scenario 1: The refresh rate of the input signal switches from the first refresh rate (120Hz) to the fourth refresh rate (288Hz)

[0135] like Figure 12 As shown, in some embodiments, when the refresh rate of the input signal is switched from 120Hz to 288Hz, the initial refresh rate is the first refresh rate (120Hz) and the target refresh rate is the fourth refresh rate (288Hz). After the second controller 250 performs blacking on the playback screen, it reads the status record of the third refresh rate multiplier switch (240Hz HSR switch) at the first refresh rate (S1201). If the third refresh rate multiplier switch is in the closed state at the first refresh rate, the fourth refresh rate multiplier switch (288Hz HSR switch) is set to the open state (S1202). Then, a setting instruction for the fourth refresh rate is sent to the first controller 251 (S1203), and the display screen parameters are set to the fourth screen parameters (S1204). The width and height of the display window are set based on the fourth screen parameters (S1205), and then the blacking is canceled so that the display 260 displays the playback screen of the drive signal according to the fourth refresh rate (S1206).

[0136] Conversely, in some embodiments, when the refresh rate of the input signal switches from 120 Hz to 288 Hz, if the third refresh rate multiplier switch (240 Hz HSR switch) is on, the second controller 252 sets the third refresh rate multiplier switch to off (S1207), sends a first refresh rate setting instruction to the first controller 250 (S1208), and sets the display screen parameters to the first screen parameters (S1209). Under the first screen parameters, steps S1202-S1206 are executed based on the second controller 252.

[0137] Optionally, in some embodiments, when the refresh rate of the input signal is switched from 120Hz to 288Hz, the second controller 252, after performing blackout, also sets the backlight adjustment switch (local dimming switch) to the off state and the variable refresh rate switch (VRR switch) to the off state to disable the VRR and FreeSync functions.

[0138] Scenario 2: The refresh rate of the input signal switches from the third refresh rate (240Hz) to the fourth refresh rate (288Hz)

[0139] like Figure 13As shown, in some embodiments, when the refresh rate of the input signal switches from 240Hz to 288Hz, the initial refresh rate is the third refresh rate (240Hz) and the target refresh rate is the fourth refresh rate (288Hz). After the second controller 250 performs blacking on the playback screen, the third refresh rate multiplier switch is set to the off state based on the second controller 252 (S1301). Then, a setting instruction for the first refresh rate is sent to the first controller 250 (S1302), and the display screen parameters are set to the first screen parameters (S1303). Then, the fourth refresh rate multiplier switch (288Hz HSR switch) is set to the on state (S1304). A setting instruction for the fourth refresh rate is sent to the first controller 251 (S1305), and the display screen parameters are set to the fourth screen parameters (S1306). The width and height of the display window are set based on the fourth screen parameters (S1307), and then the blacking is canceled so that the display 260 displays the playback screen of the drive signal according to the fourth refresh rate (S1308).

[0140] Optionally, in some embodiments, when the refresh rate of the input signal is switched from 240 Hz to 288 Hz, the second controller 252, after performing blackout, also sets the backlight adjustment switch (local dimming switch) to the off state. Since the 240 Hz before the change is also mutually exclusive with the variable refresh rate function, the second controller 252 no longer needs to turn off the variable refresh rate switch.

[0141] Scenario 3: The refresh rate of the input signal switches from the second refresh rate (144Hz) to the fourth refresh rate (288Hz)

[0142] like Figure 14 As shown, in some embodiments, when the refresh rate of the input signal switches from 144 Hz to 288 Hz, the initial refresh rate is the second refresh rate and the target refresh rate is the fourth refresh rate. Before blacking out the playback image, the second controller 252 also reads the state record of the fourth refresh rate multiplier switch (288 Hz HSR) at the second refresh rate (S1401). If the fourth refresh rate multiplier switch is off at the second refresh rate, the step of blacking out the playback image is executed.

[0143] 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 closed state at the fourth refresh rate, after the second controller 252 performs blacking on the playback screen, a setting instruction for the first refresh rate is sent to the first controller 250 (S1402), and the display screen parameters are set to the first screen parameters (S11403). Then, the fourth refresh rate multiplier switch (288Hz HSR switch) is set to the on state (S1404). A setting instruction for the fourth refresh rate is sent to the first controller 251 (S1405), and the display screen parameters are set to the fourth screen parameters (S1406). The width and height of the display window are set based on the fourth screen parameters (S1407), and then the blacking is canceled so that the display 260 displays the playback screen of the drive signal according to the fourth refresh rate (S1408).

[0144] Optionally, 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 in the off state at the second refresh rate, the second controller 252 performs blackout on the playback screen, and then sets the backlight adjustment switch (local dimming switch) to the off state, and sets the variable refresh rate switch (VRR switch) to the off state.

[0145] On the other hand, if the fourth refresh rate multiplication switch (288Hz HSR switch) is turned on at the second refresh rate, the fourth refresh rate switch remains turned on and the display screen parameter is maintained at the fourth screen parameter (S1409), so that the first controller 251 converts the input signal into a drive signal of the fourth refresh rate. At this time, the first controller 251 and the second controller 252 do not need to perform any processing.

[0146] Scenario 4: The refresh rate of the input signal switches from the fourth refresh rate (288Hz) to the third refresh rate (240Hz)

[0147] like Figure 15As shown, in some embodiments, when the refresh rate of the input signal is switched from 288Hz to 240Hz, the initial refresh rate is the fourth refresh rate (288Hz) and the target refresh rate is the third refresh rate (240Hz). After the second controller 252 performs blacking on the playback screen, the fourth refresh rate multiplier switch (288Hz HSR switch) is set to the off state (S1501). Then, a setting instruction for the first refresh rate is sent to the first controller 251 (S1502), and the display screen parameters are set to the first screen parameters (S1503). Under the first screen parameters, the third refresh rate multiplier switch (240Hz HSR switch) is set to the on state (S1504). A setting instruction for the third refresh rate is sent to the first controller 251 (S1505), and the display screen parameters are set to the third screen parameters (S1506). The width and height of the playback screen are set based on the third screen parameters (S1507). The blacking is canceled so that the display 260 displays the playback screen of the drive signal according to the third refresh rate (S1508).

[0148] Optionally, in some embodiments, when the refresh rate of the input signal is switched from 288 Hz to 240 Hz, the second controller 252, after performing blackout, also sets the backlight adjustment switch (local dimming switch) to the off state. Since the 288 Hz before the change is also mutually exclusive with the variable refresh rate function, the second controller 252 no longer needs to turn off the variable refresh rate switch (VRR switch).

[0149] Scenario 5: The refresh rate of the input signal switches from the fourth refresh rate (288Hz) to the first refresh rate (120Hz)

[0150] like Figure 16As shown, 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 controller 252 performs blacking on the playback screen, the fourth refresh rate multiplier switch (288Hz HSR switch) is set to the off state (S1601). The state record of the third refresh rate multiplier switch (240Hz HSR switch) at the first refresh rate is read (S1602). If the third refresh rate multiplier switch is on at the first refresh rate, the second controller 252 sends a setting instruction for the first refresh rate to the first controller 251 (S1603), and sets the display screen parameters to the first screen parameters (S1604). Under the first screen parameters, the third refresh rate multiplier switch (240Hz HSR switch) is set to the on state (S1605). The setting instruction for the third refresh rate is sent to the first controller 251 (S1606), and the display screen parameters are set to the third screen parameters (S1607). The width and height of the playback image are set based on the third screen parameter (S1608). The black mask is removed so that the display 260 displays the playback image of the drive signal at the third refresh rate (S1609). In this embodiment, the refresh rate of the input signal is 120 Hz, but the refresh rate of the drive signal output by the first controller 251 is multiplied to 240 Hz.

[0151] Conversely, in some 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 controller 252 sends a setting instruction for the first refresh rate to the first controller 251 (S1610). The display screen parameters are switched to the first screen parameters (S1611). The width and height of the playback image are then set based on the first screen parameters. The masking is then removed so that the display 260 displays the playback image of the drive signal at the first refresh rate (S1608-S1609).

[0152] Optionally, in some embodiments, when the refresh rate of the input signal is switched from 288 Hz to 120 Hz, the second controller 252 performs blacking on the playback screen, then sets the backlight adjustment switch (local dimming switch) to the off state, and sets the variable refresh rate switch (vrr switch) to the off state. After the second controller 252 sets the display screen parameters to the first screen parameters, the second controller 252 also records the state of the variable refresh rate switch at the first refresh rate (S1612). If the variable refresh rate switch is on at the first refresh rate, the variable refresh rate switch is set to on (S1613); otherwise, no processing is performed.

[0153] Scenario 6: The refresh rate of the input signal switches from the fourth refresh rate (288Hz) to the second refresh rate (144Hz)

[0154] like Figure 17 As shown, in some embodiments, when the refresh rate of the input signal switches from 288 Hz to 144 Hz, the initial refresh rate is the fourth refresh rate (288 Hz) and the target refresh rate is the second refresh rate (144 Hz). Before blacking out the playback image, the second controller 252 reads the state record of the fourth refresh rate multiplier switch (288 Hz HSR) at the second refresh rate (S1701). If the fourth refresh rate multiplier switch is in the off state at the second refresh rate, the step of blacking out the playback image is executed.

[0155] That is, 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 controller 252 sets the fourth refresh rate multiplier switch to the off state after blacking out the playback screen (S1702). Then, a setting instruction for the first refresh rate is sent to the first controller 251 (S1703). The display screen parameters are set to the first screen parameters (S1704). 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 controller 252 also resets the hot plug detection of the device interface 240, that is, pulls the HPD again (S1705). A setting instruction for the fourth refresh rate is sent to the first controller 1322 (S1706), and then the display screen parameters are set to the fourth screen parameters (S1707). The width and height of the playback screen are set based on the fourth screen parameters (S1708). The masking is canceled so that the display 260 displays the playback image of the driving signal at the fourth refresh rate (S1709).

[0156] Optionally, in some embodiments, when the refresh rate of the input signal is switched from 288 Hz to 144 Hz, the second controller 252 performs blacking on the playback screen, then sets the backlight adjustment switch (local dimming switch) to the off state, and sets the variable refresh rate switch (vrr switch) to the off state. After the second controller 252 sets the display screen parameters to the second screen parameters, the second controller 252 also records the state of the variable refresh rate switch at the second refresh rate. If the variable refresh rate switch is on at the first refresh rate, the variable refresh rate switch is set to on; otherwise, no processing is performed.

[0157] Conversely, if the fourth refresh rate multiplication switch is on at the second refresh rate, this indicates that before the refresh rate change, the first controller 251 had 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 were also at the fourth screen parameters. Therefore, the second controller 252 maintains the fourth refresh rate switch on and maintains the display screen parameters at the fourth screen parameters, allowing the first controller 251 to convert the input signal into a drive signal at the fourth refresh rate (S1710). At this point, the first controller 251 and the second controller 252 do not need to perform any processing.

[0158] It is understandable that some or all of the switches corresponding to the above functions may be provided with switch controls visible in the view, for example, the switch for the frequency doubling function when the input signal is 240 Hz may be provided with switch controls visible in the view, for example, the switch for the frequency doubling function ... Figure 18 As shown, the 288Hz HSR switch is interactive only when the input signal is 144Hz or 288Hz; otherwise, the 288Hz HSR is grayed out and unavailable for interaction. Of course, some or all of the switches corresponding to various functions may not have visible switch controls. The second controller 252 can disable a function by modifying parameters in a data object. This application does not impose any restrictions on this.

[0159] Based on the above display device 200, some embodiments of the present application further provide a method for displaying a high refresh signal, which is applied to the display device 200 provided in the above embodiment, such as Figure 10 As shown, the method includes the following procedural steps:

[0160] S1001: 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 an initial refresh rate to a target refresh rate;

[0161] S1002: Sending a target refresh rate setting instruction to the first controller;

[0162] S1003: Setting the display screen parameters based on the target refresh rate so that the first controller converts the input signal into a driving signal of the target refresh rate;

[0163] S1005: Setting the width and height of the playback image based on the display screen parameters;

[0164] S1006: canceling the blackout so that the display displays the playback image of the driving signal at the target refresh rate.

[0165] It can be seen from the above technical solutions that some embodiments of the present application provide a display device and a method for displaying a high refresh signal, and the method can perform blackout on the playback screen in response to a refresh rate change event of the input signal. The refresh rate change event is a change event from the initial refresh rate to the target refresh rate. Then, a target refresh rate setting instruction is sent to the first controller, and the display screen parameters are set based on the target refresh rate, so that the first controller converts the input signal into a drive signal of the target refresh rate. The width and height of the playback screen are set based on the display screen parameters. Then, the blackout is canceled so that the display displays the playback screen of the drive signal at the target refresh rate. The method sets the refresh rate of the first controller and the display screen parameters of the display device according to the refresh rate change event of the input signal, and performs blackout on the playback screen before setting the display screen parameters, which can improve the display effect of the display device when switching between signals with different refresh rates.

[0166] It should be noted that the high refresh rate signal in the embodiment of the present application refers to a signal with a refresh rate higher than that supported by the display 260 . For example, the above-mentioned 144 Hz, 240 Hz, and 288 Hz can all be referred to as high refresh rate signals.

[0167] The same and similar parts between the various embodiments in this specification can be referenced to each other and will not be repeated here.

[0168] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus a necessary general-purpose hardware platform. Based on this understanding, the technical solutions in the embodiments of the present invention, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of the present invention or certain portions of the embodiments.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0170] For ease of explanation, the above description has been made with reference to specific embodiments. However, the above exemplary 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 are 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, characterized in that: include: 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 first controller configured to, in response to a refresh rate setting instruction, convert the input signal into a drive signal suitable for the display according to display screen parameters, and send the drive signal to the display; The second controller is configured to: 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 controller; Setting the display screen parameters based on the target refresh rate so that the first controller 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, wherein 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 controller performs blacking on the playback screen, the second controller is further configured to: 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 canceling the blackout, the second controller is further configured to: 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 participates in the on-state association of the third refresh rate multiplication switch, and the fourth screen participates in the on-state association of the fourth refresh rate multiplication 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 controller is configured to convert the input signal into a driving signal of the first refresh rate; Under the second screen parameters, the first controller is configured to convert the input signal into a driving signal of the second refresh rate; Under the third screen parameter, the first controller is configured 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 controller is configured to convert the input signal into a driving signal of the fourth refresh rate based on the frequency multiplication 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 controller sets the width and height of the display window based on the display screen parameters, the second controller is further configured to: 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 controller performs blacking on the playback screen, the second controller is further configured to: 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 controller; 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 in the on state, the second controller is configured 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 controller; 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 controller; 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 controller performs blacking on the playback screen, the second controller is further configured 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 controller; 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 controller; 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 controller is further configured to: 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 controller converts the input signal into a drive signal of the fourth refresh rate.

11. The display device according to claim 10, wherein: If the fourth refresh rate multiplying switch is in the off state at the fourth refresh rate, the second controller is configured to: sending a setting instruction for the first refresh rate to the first controller; 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 controller; 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 controller is further configured 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 controller; 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 controller is configured to: sending a setting instruction for the third refresh rate to the first controller; 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 controller is further configured 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 controller; 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 controller; 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 multiplying switch is in the off state at the first refresh rate, the second controller is configured to: sending a setting instruction for the first refresh rate to the first controller; 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 controller is further configured to: 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 controller converts the input signal into a drive signal of the fourth refresh rate.

17. The display device according to claim 16, wherein: If the fourth refresh rate multiplying switch is in the off state at the fourth refresh rate, the second controller is configured 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 controller; 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 controller; 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 includes pixels for presenting the playback screen; the second controller performs blackout on the playback screen and is configured to: A stretching instruction is sent to the first controller, so that the first controller performs stretching on the pixel points based on a frequency doubling function.

19. A method for displaying a high refresh signal, characterized in that: Applied to the display device according to any one of claims 1 to 18, the method 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 an initial refresh rate to a target refresh rate; Sending a setting instruction of the target refresh rate to the first controller; Setting the display screen parameters based on the target refresh rate so that the first controller 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