Image processing circuit and method, and display device

Abstract

Disclosed in the present application are an image processing circuit and method, and a display device. The image processing circuit comprises a signal input module, an image processing module and a signal output module, which are connected in sequence, wherein the signal input module is used for receiving a video source signal, identifying the resolution of the video source signal, and outputting the video source signal to the image processing module when the resolution of the video source signal is different from a target resolution; the image processing module is used for amplifying or scaling the video source signal on the basis of the target resolution, and then outputting the video source signal to the signal output module; and the signal output module is used for connecting to a display screen, converting the signal format of the received video source signal into a signal format required by the display screen, and then outputting the video source signal to the display screen, the target resolution being the display resolution of the display screen.

Description

Image processing circuit, method and display device

[0001] The present application claims priority to the Chinese patent application No. 202411275425.3, filed on September 11, 2024, and entitled "Image processing circuit, method and display device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of image processing, in particular to an image processing circuit, method and display device. BACKGROUND

[0003] With the popularization of large-screen high-definition display technology, rich display interface circuits also make applications more widespread. Mobile phones, tablets, notebooks and various projectors can all transmit to large display screens through HDMI (High Definition Multimedia Interface) interfaces, thereby achieving a more high-definition and larger visual display effect.

[0004] At present, due to the rich types of HDMI input devices, the video sources also have great differences. In order to obtain a better visual effect, large-screen display devices will require the display resolution of the screen to reach 4K@60HZ high-definition high-refresh rate. TECHNICAL PROBLEM

[0005] Due to the rich types of HDMI input devices, for different HDMI input devices and different resolution video source inputs, there will be a problem of incompatible display effect of the screen. TECHNICAL SOLUTION

[0006] The present application provides an image processing circuit, method and display device, which can alleviate the current problem of incompatible display between large-screen display devices and different video sources.

[0007] The image processing circuit provided by the present application comprises a signal input module, an image processing module and a signal output module connected in sequence.

[0008] The signal input module is configured to receive a video source signal and identify the resolution of the video source signal, and when the resolution of the video source signal is different from a target resolution, output the video source signal to the image processing module.

[0009] The image processing module is configured to perform amplification or scaling processing on the video source signal according to the target resolution and then output the video source signal to the signal output module.

[0010] The signal output module is configured to be connected with the display screen, and convert the signal format of the received video source signal into a required signal format of the display screen and output to the display screen; wherein the target resolution is the display resolution of the display screen.

[0011] In some embodiments, the signal input module is further configured to compress the bandwidth of the video source signal and output to the image processing module when the resolution of the video source signal is greater than the target resolution.

[0012] In some embodiments, the signal input module is further configured to convert the signal format of the video source signal into a specified signal format.

[0013] In some embodiments, the signal input module is further configured to output the video source signal to the signal output module when the resolution of the video source signal is the same as the target resolution.

[0014] In some embodiments, the signal input module comprises an input interface and a bridge unit, and the input interface is connected with the bridge unit.

[0015] The input interface is configured to receive the video source signal.

[0016] The bridge unit is configured to identify the resolution of the video source signal, and output the video source signal to the image processing module when the resolution of the video source signal is different from the target resolution.

[0017] In some embodiments, the signal output module comprises a switch and a conversion unit, and the switch is connected with the image processing module and the signal input module respectively, and the switch is further connected with the conversion unit.

[0018] The switch is configured to switch the path formed by the image processing module and the conversion unit, or the path formed by the signal input module and the conversion unit.

[0019] The conversion unit is configured to be connected with the display screen, and convert the signal format of the received video source signal into a required signal format of the display screen and output to the display screen.

[0020] In some embodiments, the bridge unit is further configured to output the video source signal to the signal output module when the resolution of the video source signal is the same as the target resolution.

[0021] In some embodiments, the bridge unit is further configured to compress the bandwidth of the video source signal and output to the image processing module when the resolution of the video source signal is greater than the target resolution.

[0022] In some embodiments, the bridge unit is further configured to convert the signal format of the video source signal into a specified signal format.

[0023] In some embodiments, the image processing circuit, the input interface comprises an HDMI interface.

[0024] The embodiments of the present application also provide a display device, which comprises a display screen and an image processing circuit, the image processing circuit is used for providing an image display signal for the display screen according to a video source signal; the image processing circuit comprises a signal input module, an image processing module and a signal output module connected in sequence; the signal input module is used for receiving the video source signal and identifying the resolution of the video source signal, and when the resolution of the video source signal is different from a target resolution, the video source signal is output to the image processing module; the image processing module is used for performing amplification or scaling processing on the video source signal according to the target resolution and then outputting to the signal output module; the signal output module is used for being connected with the display screen and converting the signal format of the received video source signal into a required signal format of the display screen and then outputting to the display screen; wherein the target resolution is the display resolution of the display screen.

[0025] In some embodiments, the display device, wherein the signal input module comprises an input interface and a bridge unit, the input interface is connected with the bridge unit;

[0026] The input interface is used for receiving the video source signal;

[0027] The bridge unit is used for identifying the resolution of the video source signal, and when the resolution of the video source signal is different from a target resolution, the video source signal is output to the image processing module.

[0028] In some embodiments, the display device, wherein the signal output module comprises a switching switch and a conversion unit, the switching switch is connected with the image processing module and the signal input module respectively, and the switching switch is further connected with the conversion unit;

[0029] The switching switch is used for switching to form a path between the image processing module and the conversion unit, or to form a path between the signal input module and the conversion unit;

[0030] The conversion unit is used for being connected with the display screen and converting the signal format of the received video source signal into a required signal format of the display screen and then outputting to the display screen.

[0031] In some embodiments, the display device, wherein the bridge unit is further used for outputting the video source signal to the signal output module when the resolution of the video source signal is the same as the target resolution.

[0032] In some embodiments, the display device, wherein the bridge unit is further used for performing compression processing on the bandwidth of the video source signal and then outputting to the image processing module when the resolution of the video source signal is greater than the target resolution.

[0033] The display device in some embodiments, wherein the bridge unit is further configured to convert the signal format of the video source signal into a specified signal format.

[0034] The embodiment of the present application further provides an image processing method, which comprises the following steps: acquiring a video source signal; identifying the resolution of the video source signal; when the resolution of the video source signal is different from a target resolution, performing amplification or scaling processing on the video source signal according to the target resolution, and converting the signal format of the video source signal into a required signal format of a display screen and outputting the signal format to the display screen; wherein the target resolution is the display resolution of the display screen.

[0035] The image processing circuit in some embodiments, after identifying the resolution of the video source signal, further comprises the following steps:

[0036] When the resolution of the video source signal is the same as the target resolution, the signal format of the received video source signal is converted into the required signal format of the display screen and output to the display screen.

[0037] The image processing circuit in some embodiments, before performing amplification or scaling processing on the video source signal according to the target resolution, further comprises the following steps:

[0038] When the resolution of the video source signal is different from the target resolution, the bandwidth of the video source signal is compressed.

[0039] The image processing circuit in some embodiments, after identifying the resolution of the video source signal, further comprises the following steps:

[0040] The signal format of the video source signal is converted into a specified signal format. Advantages

[0041] The image processing circuit, method and display device provided by the present application, the image processing circuit comprises a signal input module, an image processing module and a signal output module connected in sequence; the image processing circuit identifies the resolution of the acquired video source signal, when the resolution of the video source signal is different from a target resolution, it indicates that the resolution of the video source signal does not match the display resolution of the display screen, and the display screen cannot display a better display effect. Therefore, the video source signal will be amplified or compressed according to the target resolution, so that the resolution of the video source signal is converted to match the target resolution, ensuring the display effect of the display screen, and improving the compatibility of the display screen with different video source signals. BRIEF DESCRIPTION OF DRAWINGS

[0042] The technical scheme and other advantages of the present application will be apparent from the following detailed description of the specific embodiments of the present application, combined with the accompanying drawings.

[0043] Fig. 1 is a structural schematic diagram of a first embodiment of an image processing circuit provided by the present application.

[0044] Fig. 2 is a structural schematic diagram of a second embodiment of an image processing circuit provided by the present application.

[0045] Fig. 3 is a structural schematic diagram of a signal input module and a signal output module in an image processing circuit provided by the present application.

[0046] Fig. 4 is a structural schematic diagram of an image processing module in an image processing circuit provided by the present application.

[0047] Fig. 5 is a flowchart of an image processing method provided by the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0049] In addition, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, so the features with "first", "second" can explicitly or implicitly include one or more features, and in the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0050] Please refer to Fig. 1, the present embodiment provides an image processing circuit, which comprises a signal input module, an image processing module and a signal output module connected in sequence, and the signal output module is used to be connected with a display screen. Among them, the signal input module is used to receive a video source signal and identify the resolution of the video source signal, that is, to compare the resolution of the acquired video source signal with a target resolution to see if the resolution of the video source signal is consistent with the target resolution. When the resolution of the video source signal is different from the target resolution, the video source signal is output to the image processing module; the image processing module is used to output the video source signal to the signal output module after amplifying or scaling the video source signal according to the target resolution; the signal output module converts the signal format of the received video source signal into the required signal format of the display screen and outputs it to the display screen; in the present embodiment, the target resolution is the display resolution of the display screen.

[0051] The image processing circuit in the embodiment identifies the resolution of the acquired video source signal. When the resolution of the video source signal is different from the target resolution, it indicates that the resolution of the video source signal does not match the display resolution of the display screen, and the display screen cannot display a better display effect. Therefore, the video source signal is amplified or compressed according to the target resolution, so that the resolution of the video source signal is converted to match the target resolution, ensuring the display effect of the display screen, and improving the compatibility of the display screen with different video source signals.

[0052] Referring to FIG. 2, in some embodiments, the signal input module is also used to output the video source signal to the signal output module when the resolution of the video source signal is the same as the target resolution, indicating that the resolution of the video source signal matches the display resolution of the display screen. The signal format of the video source signal is converted by the signal output module to obtain the required signal format of the display screen, ensuring normal display of the display screen.

[0053] When the resolution of the video source signal is greater than the target resolution, the image processing module can compress the video source signal to obtain the target resolution; otherwise, when the resolution of the video source signal is less than the target resolution, the image processing module can amplify the video source signal to obtain the target resolution, thereby improving the compatibility of the display screen with the video source signal. For example, the display resolution of the display screen is 4K. For a 4K@60HZ video source signal, the image processing module does not need to be processed, and the signal input module can directly output the video source signal to the signal output module for signal format conversion and then display by the display screen. For a 2K@60HZ, 720P or 1080P video source signal, the image processing module needs to amplify the resolution of the video source signal before transmitting it to the display screen for display. For other video source signals with a resolution greater than 4K, the image processing module can compress them before transmitting them to the display screen for display. In this way, the resolution of the video source signal is matched with the display resolution of the display screen, improving the compatibility of the display screen.

[0054] In some embodiments, the signal input module is also used to compress the bandwidth of the video source signal and output it to the image processing module when the resolution of the video source signal is different from the target resolution. That is, when the resolution of the video source signal is greater than the target resolution, considering the maximum bandwidth that the image processing module can support, the bandwidth of the video source signal can be reduced by compressing the bandwidth of the video source signal, thereby reducing the configuration required by the image processing module to reduce costs.

[0055] In some embodiments, the signal input module is further configured to convert the signal format of the video source signal into a specified signal format. For example, if the input signal is in the signal format corresponding to the HDMI 2.0 interface, the signal input module can convert it into a signal format suitable for the MIPI interface, so as to adapt to the required signal format of the image processing module or the signal output module, and ensure normal display of the display screen.

[0056] Referring to FIG. 3, as an embodiment, the signal input module includes an input interface and a bridge unit; the input interface is connected to the bridge unit. The input interface is configured to receive a video source signal; the bridge unit is configured to identify the resolution of the video source signal, and when the resolution of the video source signal is different from a target resolution, the video source signal is output to the image processing module, and when the resolution of the video source signal is the same as the target resolution, the video source signal is output to the signal output module.

[0057] That is, in this embodiment, when the bridge unit receives the video source signal through the input interface, the bridge unit identifies the resolution of the video source signal, and when the resolution of the video source signal is consistent with the target resolution, the video source signal is directly converted in signal format and then output to the signal output module. When the resolution of the video source signal is inconsistent with the target resolution, the video source signal is converted in signal format and then output to the image processing module, so that the image processing module can amplify or compress the video source signal.

[0058] Referring to FIG. 4, as an embodiment, the bridge unit in this embodiment can be implemented by a bridge chip; the corresponding input interface can be an HDMI interface, for example, HDMI 2.0. The bridge unit can be configured to convert the signal format of the video source signal into a specified signal format, such as a signal format suitable for the MIPI interface. Specifically, when the bridge chip needs to output the video source signal to the image processing module, the bridge chip converts the signal format suitable for the HDMI interface into a signal format suitable for the MIPI interface, such as completing the protocol conversion from the HDMI interface to the MIPI CSI interface; and when the bridge chip needs to output the video source signal to the signal output module, the bridge chip can convert the signal format suitable for the HDMI interface into a signal format suitable for the MIPI interface, such as completing the protocol conversion from the HDMI interface to the MIPI DSI interface. That is, the bridge unit in this embodiment needs to implement the functions of signal format conversion and signal identification of the video source signal, and of course in other embodiments, a chip or circuit structure with the same function can also be selected, which is not limited in this application.

[0059] In some embodiments, the bridge unit is also configured to compress the bandwidth of the video source signal and output to the image processing module when the resolution of the video source signal is different from the target resolution. When the resolution of the video source signal is greater than the target resolution, considering the maximum bandwidth that the image processing module can support, the bandwidth of the video source signal can be reduced by compression. For example, for a video source signal with a resolution greater than 4K and a refresh rate of 60Hz, it can be compressed to a video source signal with a resolution of 1080P@30Hz or 2K@60Hz. That is, the bandwidth can be compressed by compressing both the resolution and the refresh rate, or by compressing only the resolution or the refresh rate. Thus, the video source signal is compressed by the bridge unit to adapt to the image processing module, reducing the configuration of the image processing module and lowering the cost.

[0060] As an embodiment, the signal output module includes a switch and a conversion unit. The switch is connected to the image processing module and the signal input module, and is also connected to the conversion unit. The switch is an analog switch. The switch is used to switch the path formed by the image processing module and the conversion unit, or the path formed by the signal input module and the conversion unit. The conversion unit is used to connect to the display screen and convert the signal format of the received video source signal to the required signal format of the display screen and output to the display screen.

[0061] When the switch forms a path between the bridge unit and the conversion unit, the bridge unit can convert the format of the video source signal, such as converting the protocol from HDMI interface to MIPI DSI interface, and transmit the video source signal to the display screen through the conversion unit. When the switch forms a path between the image processing module and the conversion unit, the corresponding interface of the image processing module, such as the MIPI DSI interface, outputs the corresponding video source signal to the conversion unit. The conversion unit in this embodiment converts the input video source signal to the required signal format of the display screen. For example, if the display screen supports LVDS interface or EDP interface, the conversion unit needs to convert the protocol from MIPI interface to LVDS interface or from MIPI interface to EDP interface, thereby ensuring that the display screen can normally receive the display image signal and complete the display.

[0062] As an embodiment, the image processing module includes an application processor (AP processor). The AP processor has a MIPI CSI port and a MIPI DSI port. The MIPI CSI port is connected to the bridge unit, and the MIPI DSI port is connected to the conversion unit through the switch. In this embodiment, the AP processor amplifies or compresses the video source signal to ensure that the video source signal matches the display, so that the video source signal can be displayed with maximum clarity and smoothness.

[0063] The embodiment of the present application further provides a display device, which comprises the image processing circuit, intelligently identifies the input video source signal through the image processing circuit, and amplifies or compresses the video source signal of a non-target resolution, so that the display screen can display all video source signals of different resolutions with maximum clarity and smoothness, so as to meet the display requirement of the large-screen display device and ensure the reliability of the large-screen display device. Since the image processing circuit is described in detail above, the description is not repeated here.

[0064] Referring to FIG. 5, the embodiment of the present application further provides an image processing method, which is applied to the image processing circuit; specifically, the image processing method comprises the following steps.

[0065] 100, acquiring a video source signal and identifying the resolution of the video source signal;

[0066] 200, when the resolution of the video source signal is different from a target resolution, amplifying or scaling the video source signal according to the target resolution, and converting the signal format of the video source signal into a required signal format of the display screen and outputting the signal format to the display screen; wherein the target resolution is the display resolution of the display screen.

[0067] In the embodiment, the resolution of the video source signal acquired by the image processing circuit is identified, and when the resolution of the video source signal is different from the target resolution, it indicates that the resolution of the video source signal is not matched with the display resolution of the display screen, and the display screen cannot display a better display effect. Therefore, the video source signal is amplified or compressed according to the target resolution, so that the resolution of the video source signal is matched with the target resolution, and the display effect of the display screen is ensured, and the compatibility of the display screen with different video source signals is improved.

[0068] In some embodiments, after step 100, the method further comprises: when the resolution of the video source signal is the same as the target resolution, converting the signal format of the received video source signal into a required signal format of the display screen and outputting the signal format to the display screen. When the resolution of the video source signal is the same as the target resolution, it indicates that the resolution of the video source signal is matched with the display resolution of the display screen, and then the signal format of the video source signal is directly converted into the required signal format of the display screen, so as to ensure the normal display of the display screen.

[0069] In some embodiments, the amplification or scaling of the video source signal according to the target resolution further comprises: when the resolution of the video source signal is different from the target resolution, compressing the bandwidth of the video source signal. When the resolution of the video source signal is greater than the target resolution, considering the maximum bandwidth that can be supported by the image processing module in the image processing circuit, the bandwidth of the video source signal can be reduced by compression, so as to reduce the configuration of the image processing module and reduce the cost.

[0070] In some embodiments, the step 100 further comprises: converting the signal format of the video source signal into a specified signal format. Due to the different connection interfaces between the modules in the image processing circuit, in order to ensure the transmission and display of the video source signal, the format of the video source signal needs to be converted. For example, if the input signal is the signal format corresponding to the HDMI2.0 interface, the video source signal is converted into a signal format suitable for the MIPI interface, so as to ensure the normal transmission of the video source signal.

[0071] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0072] The image processing circuit provided by the embodiments of the present application is described in detail above, and the principle and implementation manner of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the technical solutions and core ideas of the present application; those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An image processing circuit, wherein, The signal input module, the image processing module and the signal output module are sequentially connected; The signal input module is configured to receive a video source signal and identify a resolution of the video source signal, and when the resolution of the video source signal is different from a target resolution, output the video source signal to the image processing module; The image processing module is configured to perform amplification or scaling processing on the video source signal according to the target resolution and then output the video source signal to the signal output module; The signal output module is configured to be connected with a display screen and convert a signal format of the received video source signal into a required signal format of the display screen and then output the video source signal to the display screen; and the target resolution is a display resolution of the display screen.

2. The image processing circuit of claim 1, wherein, The signal input module is further configured to, when the resolution of the video source signal is greater than the target resolution, perform compression processing on a bandwidth of the video source signal and then output the video source signal to the image processing module.

3. The image processing circuit according to claim 1, wherein The signal input module is further configured to convert a signal format of the video source signal into a specified signal format.

4. The image processing circuit according to claim 1, wherein The signal input module is further configured to, when the resolution of the video source signal is the same as the target resolution, output the video source signal to the signal output module.

5. The image processing circuit according to claim 1, wherein The signal input module comprises an input interface and a bridge unit, and the input interface is connected with the bridge unit. The input interface is configured to receive the video source signal. The bridge unit is configured to identify the resolution of the video source signal, and when the resolution of the video source signal is different from the target resolution, output the video source signal to the image processing module.

6. The image processing circuit of claim 4, wherein, The signal output module comprises a switching switch and a conversion unit, and the switching switch is connected with the image processing module and the signal input module respectively, and the switching switch is further connected with the conversion unit. The switching switch is configured to switch to form a path between the image processing module and the conversion unit, or form a path between the signal input module and the conversion unit. The conversion unit is configured to be connected with the display screen and convert a signal format of the received video source signal into a required signal format of the display screen and then output the video source signal to the display screen.

7. The image processing circuit of claim 5, wherein, The bridge unit is further configured to, when the resolution of the video source signal is the same as the target resolution, output the video source signal to the signal output module.

8. The image processing circuit of claim 5, wherein, The bridge unit is further configured to, when the resolution of the video source signal is greater than the target resolution, perform compression processing on a bandwidth of the video source signal and then output the video source signal to the image processing module.

9. The image processing circuit of claim 5, wherein, The bridge unit is further configured to convert a signal format of the video source signal into a specified signal format.

10. The image processing circuit of claim 5, wherein, The input interface comprises an HDMI interface.

11. A display device, wherein, The display device comprises: a display screen and an image processing circuit, the image processing circuit being configured to provide an image display signal for the display screen according to a video source signal; The image processing circuit comprises a signal input module, an image processing module and a signal output module connected in sequence; the signal input module is configured to receive a video source signal and identify a resolution of the video source signal, and when the resolution of the video source signal is different from a target resolution, output the video source signal to the image processing module; the image processing module is configured to perform amplification or scaling processing on the video source signal according to the target resolution and output the video source signal to the signal output module; and the signal output module is configured to be connected with a display screen and convert a signal format of the received video source signal into a required signal format of the display screen and output the signal format to the display screen; wherein the target resolution is a display resolution of the display screen.

12. The display device of claim 11, wherein, The signal input module comprises an input interface and a bridge unit, and the input interface is connected with the bridge unit. The input interface is configured to receive the video source signal. The bridge unit is configured to identify the resolution of the video source signal, and when the resolution of the video source signal is different from the target resolution, output the video source signal to the image processing module.

13. The display device of claim 11, wherein, The signal output module comprises a switching switch and a conversion unit, and the switching switch is connected with the image processing module and the signal input module respectively, and further connected with the conversion unit. The switching switch is configured to switch to form a path between the image processing module and the conversion unit, or form a path between the signal input module and the conversion unit. The conversion unit is configured to be connected with the display screen and convert a signal format of the received video source signal into a required signal format of the display screen and output the signal format to the display screen.

14. The display device of claim 12, wherein, The bridge unit is further configured to, when the resolution of the video source signal is the same as the target resolution, output the video source signal to the signal output module.

15. The display device of claim 12, wherein, The bridge unit is further configured to, when the resolution of the video source signal is greater than the target resolution, perform compression processing on a bandwidth of the video source signal and output the video source signal to the image processing module.

16. The display device of claim 12, wherein, The bridge unit is further configured to convert the signal format of the video source signal into a specified signal format.

17. An image processing method, wherein, The image processing method comprises: receiving a video source signal and identifying a resolution of the video source signal; when the resolution of the video source signal is different from a target resolution, performing amplification or scaling processing on the video source signal according to the target resolution and converting a signal format of the video source signal into a required signal format of a display screen and outputting the signal format to the display screen; wherein the target resolution is a display resolution of the display screen.

18. The image processing method of claim 17, wherein, The identification of the resolution of the video source signal further comprises: when the resolution of the video source signal is the same as the target resolution, converting a signal format of the received video source signal into a required signal format of the display screen and outputting the signal format to the display screen.

19. The image processing method of claim 17, wherein, The amplification or scaling processing on the video source signal according to the target resolution further comprises: when the resolution of the video source signal is greater than the target resolution, performing compression processing on a bandwidth of the video source signal.

20. The image processing method of claim 17, wherein, The identifying the resolution of the video source signal further comprises: converting the signal format of the video source signal to a specified signal format.

Images