Display control device, method, and display apparatus

Abstract

The application discloses a display control device, method and display equipment, wherein the display control device comprises a first signal input channel, a second signal input channel and a picture quality processing module; the first signal input channel is used for receiving a first fixed refresh rate signal and outputting a first image display signal according to the first fixed refresh rate signal; the second signal input channel is used for receiving a second fixed refresh rate signal and outputting a second image display signal according to the second fixed refresh rate signal; wherein the maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal; the picture quality processing module is connected with the first signal input channel and the second signal input channel respectively, and is used for outputting the first image display signal or the second image display signal after picture quality processing to a display screen, so that the display screen displays a corresponding image picture; and the application can expand the application scene of the display equipment.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display control device, method, and display equipment. Background Technology

[0002] Currently, conventional image quality chip solutions are mainly based on TCON, adding image quality processing, namely VBO (V-by-one) signal input and P2P (point-to-point) signal output, to enhance image quality. This architecture requires the signal bandwidth of the image quality chip to match the signal processing bandwidth of the front-end SoC (System on Chip). For example, when a display product needs to support 4K*2K 165Hz signals, the front-end SoC must support 4K*2K 165Hz HDMI 2.1 input and V-BY-ONE output, and the back-end image quality chip must also support 4K*2K 165Hz V-BY-ONE signal input and P2P signal output.

[0003] However, due to the high development cost and long development cycle of SoC, it is impossible to adapt to the market demand for high refresh rate displays in a timely manner. For example, the current market and promotion of displays with a refresh rate of 165Hz, but existing SoCs only support 144Hz bandwidth output. Therefore, the signal bandwidth of the overall chip solution is limited by the SoC, which limits the application scenarios of display products. Summary of the Invention

[0004] This application provides a display control device, method, and display equipment, which can alleviate the problem of limited application scenarios for current display products.

[0005] This application provides a display control device, which includes:

[0006] The first signal input channel is used to receive a first fixed refresh rate signal and output a first image display signal according to the first fixed refresh rate signal.

[0007] The second signal input channel is used to receive the second fixed refresh rate signal and output the second image display signal according to the second fixed refresh rate signal; wherein, the maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal.

[0008] The image quality processing module is connected to the first signal input channel and the second signal input channel respectively. The image quality processing module is used to process the first image display signal or the second image display signal and then output it to the display screen so that the display screen displays the corresponding image.

[0009] In some embodiments of the display control device, the first signal input channel is further configured to receive a first variable refresh rate signal and output a third image display signal according to the first variable refresh rate signal;

[0010] The second signal input channel is also used to receive the second variable refresh rate signal and output the fourth image display signal according to the second variable refresh rate signal; wherein, the maximum refresh rate of the second variable refresh rate signal is greater than the maximum refresh rate of the first variable refresh rate signal;

[0011] The image quality processing module is also used to process the third and fourth image display signals and output them to the display screen so that the display screen can display the corresponding image.

[0012] In some embodiments of the display control device, the second signal input channel is further configured to output an audio signal to the first signal input channel according to a second fixed refresh rate signal or a second variable refresh rate signal;

[0013] The first signal input channel is also used to amplify and output the audio signal.

[0014] In some embodiments of the display control device, the first signal input channel is further configured to output a screen display signal to the second signal input channel;

[0015] The second signal input channel is also used to superimpose the screen display signal with the second image display signal or the fourth image display signal and output them together to the image quality processing module.

[0016] In some embodiments of the display control device, the first signal input channel is further used to output screen display signals to the image quality processing module;

[0017] The image quality processing module is also used to superimpose the screen display signal with the second image display signal or the fourth image display signal output from the second signal input channel, and then output the image quality processing signal to the display screen.

[0018] In some embodiments of the display control device, the display control device further includes a conversion module, which is connected to the second signal input channel and the image quality processing module respectively;

[0019] The conversion module is used to convert the format of the second image display signal or the fourth image display signal output from the second signal input channel and then output it to the image quality processing module.

[0020] In some embodiments of the display control device, the second image display signal or the fourth image display signal output by the conversion module is a V-By-One signal.

[0021] This application embodiment also provides a display device, which includes:

[0022] Display screen;

[0023] The aforementioned display control device is connected to the display screen and is used to provide the display screen with a first image display signal or a second image display signal after image quality processing.

[0024] This application embodiment also provides a display control method, which is applied to the above-mentioned display control device, and the display control method includes:

[0025] A first image display signal is output from a first signal input channel based on a received first fixed refresh rate signal, or a second image display signal is output from a second signal input channel based on a received second fixed refresh rate signal; wherein the maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal.

[0026] The image quality processing module processes the first image display signal or the second image display signal and outputs it to the display screen, so that the display screen displays the corresponding image.

[0027] In some embodiments of the display control method, the display control method further includes:

[0028] A first image display signal is output from the first signal input channel based on the received first variable refresh rate signal, or a second image display signal is output from the second signal input channel based on the received second fixed refresh rate signal; wherein, the maximum refresh rate of the second variable refresh rate signal is greater than the maximum refresh rate of the first variable refresh rate signal;

[0029] The image quality processing module processes the third or fourth image display signal and outputs it to the display screen, so that the display screen displays the corresponding image.

[0030] This application provides a display control device, method, and display apparatus. The display control device includes a first signal input channel for receiving a first fixed refresh rate signal and outputting a first image display signal based on the first fixed refresh rate signal; a second signal input channel for receiving a second fixed refresh rate signal and outputting a second image display signal based on the second fixed refresh rate signal; and an image quality processing module for processing the first or second image display signal and outputting it to a display screen, causing the display screen to display the corresponding image. The maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal. In this embodiment, by setting two signal input channels to share a single image quality processing module, and by recognizing that the two signal input channels can receive fixed refresh rate signals with different maximum refresh rates, the compatibility of the display apparatus can be avoided due to the use of a single signal input channel, thus expanding the application scenarios of the display apparatus. Furthermore, this method saves costs compared to using a single signal input channel with high refresh rate compatibility. Attached Figure Description

[0031] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0032] Figure 1 This is a structural block diagram of the first embodiment of the display control device provided in this application.

[0033] Figure 2 This is a structural block diagram of a second embodiment of the display control device provided in this application.

[0034] Figure 3 The structural block diagram of the first signal input channel and the second signal input channel in the display control device provided in the embodiments of this application is shown.

[0035] Figure 4 A flowchart of the first embodiment of the display control method provided in this application.

[0036] Figure 5 A flowchart of the second embodiment of the display control method provided in this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Please see Figure 1 This embodiment provides a display device, which includes a display screen 20 and a display control device 10. The display control device 10 includes a first signal input channel 11, a second signal input channel 12 and an image quality processing module 13. The image quality processing module 13 is connected to the first signal input channel 11, the second signal input channel 12 and the image quality processing module 13 respectively.

[0040] In specific implementation, the first signal input channel 11 is used to receive a first fixed refresh rate signal and output a first image display signal according to the first fixed refresh rate signal; the second signal input channel 12 is used to receive a second fixed refresh rate signal and output a second image display signal according to the second fixed refresh rate signal; the image quality processing module 13 is used to process the first image display signal or the second image display signal and output it to the display screen 20, so that the display screen 20 displays the corresponding image; wherein, the maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal. In this embodiment, by setting two signal input channels, the two signal input channels share one image quality processing module; the maximum refresh rates of the fixed refresh rate signals that the two signal input channels can receive are different, thereby avoiding the poor compatibility of the display device caused by setting a single signal input channel, thus expanding the application scenarios of the display device; at the same time, compared with setting a single signal input channel with high refresh rate compatibility, it can save costs.

[0041] In some embodiments, the first signal input channel 11 is further configured to receive a first variable refresh rate signal and output a third image display signal according to the first variable refresh rate signal; the second signal input channel 12 is further configured to receive a second variable refresh rate signal and output a fourth image display signal according to the second variable refresh rate signal; the image quality processing module 13 is further configured to perform image quality processing on the third image display signal and the fourth image display signal and output them to the display screen 20, so that the display screen 20 displays the corresponding image; wherein, the maximum refresh rate of the second variable refresh rate signal is greater than the maximum refresh rate of the first variable refresh rate signal. That is, the display control device 10 in this embodiment can not only realize the display mode of a fixed refresh rate signal, but also the display mode of a variable refresh rate signal, thereby further expanding the application scenarios of the display device.

[0042] In some embodiments, the second signal input channel 12 is further configured to output an audio signal to the second signal input channel 12 according to a second fixed refresh rate signal or a second variable refresh rate signal; the first signal input channel 11 is further configured to amplify the audio signal before outputting it. In this embodiment, the first signal input channel 11 is further configured to output a corresponding audio signal according to a first fixed refresh rate signal or a first variable refresh rate signal. The audio signal output according to the first fixed refresh rate signal or the second variable refresh rate signal is used as the first audio signal, and the audio signal output according to the second fixed refresh rate signal or the second variable refresh rate signal is used as the second audio signal.

[0043] Regardless of whether it is a variable refresh rate display mode or a fixed refresh rate mode, when a higher refresh rate needs to be adapted, the second signal input channel 12 receives the corresponding fixed refresh rate signal or variable refresh rate signal for the higher refresh rate. The image signal output according to the fixed refresh rate signal or variable refresh rate signal is sent to the image quality processing module 13. The image quality processing module 13 performs image quality processing and then controls the display screen 20 to display the image. The second audio signal output according to the fixed refresh rate signal or variable refresh rate signal is sent to the first signal input channel 11. The first signal input channel 11 amplifies the audio signal and outputs the audio signal, thereby realizing the audio output and image display of the display device.

[0044] In some embodiments, the first signal input channel 11 is further configured to output an OSD (On-Screen Display) signal to the second signal input channel 12; the second signal input channel 12 is further configured to superimpose the OSD signal with a second image display signal or a fourth image display signal and output them together to the image processing module. That is, when the display device in this embodiment is used for UI (User Interface) display, the first signal input channel 11 can provide the corresponding OSD signal to the second signal input channel 12, and the OSD signal and image signal can be superimposed and displayed on the display screen 20, thereby realizing multiple different application scenarios of the display device.

[0045] In some implementations, the first signal input channel 11 is also used to output a screen display signal to the image quality processing module 13; the image quality processing module 13 is also used to superimpose the screen display signal with the second image display signal or the fourth image display signal output from the second signal input channel 12, and output the image quality signal to the display screen 20 after image quality processing. Therefore, when the display device is used for UI display, the screen display signal can be superimposed with the screen display signal through the second signal input channel 12, or, similar to this embodiment, the screen display signal can be superimposed through the image quality processing module 13, thereby improving the flexibility of the display control device 10.

[0046] Please see Figure 2In some embodiments, the display control device 10 further includes a conversion module 14, which is connected to the second signal input channel 12 and the image quality processing module 13 respectively. The conversion module 14 is used to convert the format of the second image display signal or the fourth image display signal output from the second signal input channel 12 and then output it to the image quality processing module 13. That is, when the format of the second image display signal or the fourth image display signal output from the first signal input channel 11 is not a signal that the image quality processing module 13 can receive, the conversion module 14 is needed to convert the format of the second image display signal or the fourth image display signal output from the first signal input channel 11 to ensure the normal operation of the display device.

[0047] Please see Figure 3 As one embodiment, the first signal input channel 11 in this embodiment includes a SOC, which is an abbreviation for System on Chip, commonly referred to as "System on Chip". The SOC has multiple HDMI interfaces, a first conversion unit 111, a motion estimation and compensation unit 112, a first image quality data processor 113, a first processor 114 (such as a DPU: Deep learning Processing Unit), an image processor 115 (such as a GPU: Graphics Processing Unit), an operational amplifier 116, and a first transmission port 117. Among them, the multiple HDMI interfaces are all connected to the first conversion unit 111, the first conversion unit 111 is also connected to the motion estimation and compensation unit 112, the motion estimation and compensation unit 112 is also connected to the first processor 114 through the image quality data processor, and the first processor 114 is also connected to the operational amplifier 116 and the first transmission port 117 respectively.

[0048] Specifically, in this embodiment, there can be four HDMI interfaces: HDMI1-IN, HDMI2-IN, HDMI3-IN, and HDMI4-IN. HDMI1-IN and HDMI2-IN can be HDMI 2.1 interfaces; HDMI3-IN and HDMI4-IN can be HDMI 2.0 interfaces. The HDMI 2.1 interface can be used to receive a first variable refresh rate signal and a first fixed refresh rate signal; while the HDMI 2.0 interface can be used to receive the first fixed refresh rate signal.

[0049] In this embodiment, the SOC chip can be paired with an image quality processing module. It receives a first fixed refresh rate signal, such as a 4K 144Hz source signal, as input. The first conversion unit 111 converts the format of this signal and outputs it. The motion estimation and compensation unit 112 then performs motion estimation and compensation processing on the converted signal. Afterwards, the first image quality data processor 113 processes the signal output from the motion estimation and compensation unit 112 and outputs it to the first processor 114. The first processor 114 processes the signal output from the first image quality data processor 113 and outputs it to the image quality processing module 13 via the first transmission port 117, thus enabling the SOC and image quality processing module 13 to work together. It should be noted that the SOC chip structure is known; therefore, the processing procedure for the first fixed refresh rate signal or the first variable refresh rate signal by the SOC will not be described in detail.

[0050] As one embodiment, the second signal input channel 12 in this embodiment includes a display chip, which is either a monitor chip or an input chip. Specifically, the display chip has two HDMI interfaces, a second conversion unit 121, an image preprocessing unit 122, a second processor 123 (such as a DPU: Deep learning Processing Unit), a second image quality data processor 124, and a second transmission port 125. Both HDMI interfaces are connected to the second conversion unit 121, which is connected to the image preprocessing unit 122. The image preprocessing unit 122 is connected to the second transmission port 125 via the second processor 123, and is also connected to the second image quality data processor 124. The two HDMI interfaces in the display chip are an HDMI 5-IN interface and an HDMI 6-IN interface, both of which are HDMI 2.1 interfaces.

[0051] As one embodiment, the image quality processing module 13 is an image quality processing chip that integrates the Tcon chip function; the image quality processing chip supports receiving V-By-One signals.

[0052] In this embodiment, by using a System-on-a-Chip (SOC) in conjunction with a display chip and an image processing chip, a higher refresh rate display can be achieved compared to using a SOC alone with an image processing chip. Specifically, taking 4K*2K*165Hz output as an example, a second fixed refresh rate signal, such as a 4K 165Hz source signal, is input through the HDMI interface of the display chip. After a series of processing steps by the second conversion unit 121, the image preprocessing unit 122, the second processor 123, and the second image data processor 124, the second fixed refresh rate signal is output as a second image display signal to the image processing chip via the second transmission port 125. If the second image display signal is a V-By-One signal, it can be directly input to the image processing chip; if the second image display signal is an eDP signal, a MIPI signal, or an LVDS signal, it is converted to a V-By-One signal by the conversion module 14 before being input to the image processing chip to complete the subsequent display process. Since the structure of the display chip is known, the processing procedure of the display chip for the second fixed refresh rate signal will not be described in detail.

[0053] Because the second fixed refresh rate signal also includes an audio signal, the display chip outputs the second fixed refresh rate signal input via the HDMI interface to the SOC chip (e.g., ...). Figure 3 As shown in transmission path A, the second fixed refresh rate signal is received by the HDMI 2.0 interface of the SOC chip, and the second audio signal in the second fixed refresh rate signal is separated by the first conversion unit 111. Then, the second audio signal is amplified and output, so that the second audio signal is adapted to the second image display signal output by the image quality processing chip.

[0054] Of course, the second audio signal in the second fixed refresh rate signal can also be directly separated and output by the second conversion unit 121 to the first processor 114 in the SOC chip for processing (e.g. Figure 3 As shown in transmission path B, the first processor 114 outputs the input second audio signal to the operational amplifier 116 for amplification and then outputs it, so that the second audio signal is adapted to the second image display signal output by the image processing chip.

[0055] In this embodiment, a SOC chip is combined with a display chip and an image processing chip. This achieves the refresh rate supported by the SOC chip itself, while also utilizing the refresh rate supported by the display chip to enable higher refresh rate input displays. This expands the application scenarios of the display device and reduces the limitations imposed by the SOC chip on these scenarios. Simultaneously, compared to using a separate high refresh rate chip, it effectively reduces chip costs.

[0056] In this embodiment, a UI display mode can also be achieved by combining a SOC chip with a display chip and an image processing chip. Specifically, the image processor 115 of the SOC chip outputs a screen display signal, which is then output to the second image processing data processor 124 in the display chip via the second transmission port 125. Figure 3 As shown in the transmission path C), after being processed by the second image quality data processor 124, the signal is output to the image preprocessing unit 122. The image preprocessing unit 122 uses HDR (High-Dynamic Range) technology to process the screen display signal and superimposes it with the first image display signal output by the first conversion unit 111 before outputting it to the second processor 123. After passing through the second processor 123, the signal is output to the image quality processing chip through the second transmission port 125 to facilitate UI display.

[0057] Of course, the screen display signal output by the image processor 115 of the SOC chip can also be directly output to the image quality processing chip (such as...) via the second transmission port 125. Figure 3 As shown in the transmission path D), after the image processing chip and the second image display signal are superimposed, the signal is output to the display screen 20 via the image processing chip, thereby realizing the UI display. It should be noted that the specific structure of the image processing chip is known, so the specific processing process of the image processing chip for the second image display signal and the screen display signal will not be described here.

[0058] This application also provides a display control device, which will not be described in detail here, as the above description has already described the display control device in detail.

[0059] Please see Figure 4 This application also provides a display control method, which is applied in the above-mentioned display control device. The display control method includes:

[0060] 100. A first image display signal is output from the first signal input channel based on the received first fixed refresh rate signal, or a second image display signal is output from the second signal input channel based on the received second fixed refresh rate signal; wherein, the maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal;

[0061] 200. The image quality processing module processes the first image display signal or the second image display signal and outputs it to the display screen, so that the display screen displays the corresponding image.

[0062] In this embodiment, two signal input channels share a single image processing module to control the display screen. The maximum refresh rates of the fixed refresh rate signals that the two signal input channels can receive are different, which avoids the poor compatibility of the display device caused by setting a single signal input channel, thereby expanding the application scenarios of the display device. At the same time, it can save costs compared to setting a single signal input channel with high refresh rate compatibility.

[0063] Please see Figure 5 In some embodiments, the display control method further includes:

[0064] 300. A first image display signal is output from the first signal input channel based on the received first variable refresh rate signal, or a second image display signal is output from the second signal input channel based on the received second fixed refresh rate signal; wherein, the maximum refresh rate of the second variable refresh rate signal is greater than the maximum refresh rate of the first variable refresh rate signal;

[0065] 400. The image quality processing module processes the third or fourth image display signal and outputs it to the display screen, so that the display screen displays the corresponding image.

[0066] The display control method in this embodiment can control the display screen to achieve both a fixed refresh rate signal display mode and a variable refresh rate signal display mode, thereby further expanding the application of display scenarios.

[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0068] The display control device provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display control device, characterized in that, The display control device includes: A first signal input channel is configured to receive a first fixed refresh rate signal and output a first image display signal based on the first fixed refresh rate signal; the first signal input channel is also configured to receive a first variable refresh rate signal and output a third image display signal based on the first variable refresh rate signal. The second signal input channel is used to receive a second fixed refresh rate signal and output a second image display signal according to the second fixed refresh rate signal; the second signal input channel is also used to receive a second variable refresh rate signal and output a fourth image display signal according to the second variable refresh rate signal; wherein, the maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal; the maximum refresh rate of the second variable refresh rate signal is greater than the maximum refresh rate of the first variable refresh rate signal; the second signal input channel is also used to output an audio signal to the first signal input channel according to the second fixed refresh rate signal or the second variable refresh rate signal; the first signal input channel is also used to amplify the audio signal before outputting it; The image quality processing module is connected to the first signal input channel and the second signal input channel respectively. The image quality processing module is used to process the first image display signal or the second image display signal and then output it to the display screen so that the display screen displays the corresponding image. The image quality processing module is also used to process the third image display signal or the fourth image display signal and then output it to the display screen so that the display screen displays the corresponding image. The first signal input channel includes a SOC, and the second signal input channel includes a display chip. Compared with setting a single signal input channel that is highly compatible with refresh rates, this can save costs. The SOC includes multiple HDMI interfaces, a first conversion unit, a motion estimation and compensation unit, a first image quality data processor, a first processor, an image processor, an operational amplifier, and a first transmit port. Each of the multiple HDMI interfaces is connected to the first conversion unit, which is also connected to the motion estimation and compensation unit. The motion estimation and compensation unit is further connected to the first processor via the image quality data processor. The first processor is also connected to the operational amplifier and the first transmit port. The multiple HDMI interfaces include HDMI1-IN, HDMI2-IN, HDMI3-IN, and HDMI4-IN. HDMI1-IN and HDMI2-IN include HDMI 2.1 interfaces; HDMI3-IN and HDMI4-IN include HDMI 2.0 interfaces. The HDMI 2.1 interface is used to receive a first variable refresh rate signal and a first fixed refresh rate signal; the HDMI 2.0 interface is used to receive the first fixed refresh rate signal. The display chip has two HDMI interfaces, a second conversion unit, an image preprocessing unit, a second processor, a second image quality data processor, and a second transmission port; both HDMI interfaces are connected to the second conversion unit, the second conversion unit is connected to the image preprocessing unit, the image preprocessing unit is connected to the second transmission port through the second processor, and the image preprocessing unit is also connected to the second image quality data processor; the two HDMI interfaces are used to receive the second fixed refresh rate signal.

2. The display control device according to claim 1, characterized in that, The first signal input channel is also used to output screen display signals to the second signal input channel; The second signal input channel is also used to superimpose the screen display signal with the second image display signal or the fourth image display signal and output them together to the image quality processing module.

3. The display control device according to claim 2, characterized in that, The first signal input channel is also used to output screen display signals to the image quality processing module; The image quality processing module is also used to superimpose the screen display signal with the second image display signal or the fourth image display signal output from the second signal input channel, and output the image quality processing signal to the display screen.

4. The display control device according to any one of claims 1-3, characterized in that, The display control device further includes a conversion module, which is connected to the second signal input channel and the image quality processing module respectively. The conversion module is used to convert the format of the second image display signal or the fourth image display signal output from the second signal input channel and then output it to the image quality processing module.

5. The display control device according to claim 4, characterized in that, The second image display signal or the fourth image display signal output by the conversion module is a V-By-One signal.

6. A display device, characterized in that, The display device includes: Display screen; The display control device according to any one of claims 1-5, wherein the display control device is connected to the display screen, and the display control device is used to provide the display screen with the first image display signal or the second image display signal after image quality processing.

7. A display control method, characterized in that, The display control method is applied to the display control device as described in any one of claims 1-5, and the display control method includes: A first image display signal is output from a first signal input channel based on a received first fixed refresh rate signal, or a second image display signal is output from a second signal input channel based on a received second fixed refresh rate signal; wherein, the maximum refresh rate of the second fixed refresh rate signal is greater than the maximum refresh rate of the first fixed refresh rate signal; The image quality processing module processes the first image display signal or the second image display signal and outputs it to the display screen, so that the display screen displays the corresponding image. Alternatively, the first signal input channel may output a third image display signal based on the received first variable refresh rate signal, or the second signal input channel may output a fourth image display signal based on the received second variable refresh rate signal; wherein, the maximum refresh rate of the second variable refresh rate signal is greater than the maximum refresh rate of the first variable refresh rate signal. The image quality processing module processes the third image display signal or the fourth image display signal and outputs it to the display screen, so that the display screen displays the corresponding image.

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