Image processing circuit and method and display equipment

Abstract

The invention discloses an image processing circuit and method and display equipment, and the image processing circuit comprises a signal input module, an image processing module and a signal output module which are sequentially connected. 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 zooming the video source signal according to the target resolution and then outputting the video source signal to the signal output module; the signal output module is used for being connected with a display screen, converting a signal format of the received video source signal into a signal format required by the display screen and outputting the signal format to the display screen; wherein the target resolution is the display resolution of the display screen; the compatibility between the display screen and different video source signals can be improved.

Description

Technical Field

[0001] The present application relates to the field of image processing technology, and in particular to an image processing circuit, method and display device. Background Art

[0002] The popularity of large-screen high-definition display technology and the rich display interface circuits have also made its application more extensive. Mobile phones, tablets, notebooks and various projectors can be transmitted to large display screens through the HDMI (High Definition Multimedia Interface) interface, thus achieving a higher definition and wider viewing angle visual display effect.

[0003] At present, due to the rich variety of HDMI input devices and the great differences in video sources, large-screen display devices are required to have a display resolution of 4K@60HZ in order to obtain better visual effects. However, for different HDMI input devices and video source inputs with different resolutions, there will be incompatibility issues in the screen display effects. Summary of the invention

[0004] The present application provides an image processing circuit, method and display device, which can alleviate the display incompatibility problem between current large-screen display devices and current different video sources.

[0005] The present application provides an image processing circuit, comprising a signal input module, an image processing module and a signal output module connected in sequence;

[0006] The signal input module is used to receive the video source signal and identify the resolution of the video source signal, and 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;

[0007] The image processing module is used to amplify or scale the video source signal according to the target resolution and then output it to the signal output module;

[0008] The signal output module is used to connect to the display screen, and convert the signal format of the received video source signal into the required signal format of the display screen and output it to the display screen; wherein the target resolution is the display resolution of the display screen.

[0009] In the image processing circuit of some embodiments, the signal input module is further 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 greater than the target resolution.

[0010] In the image processing circuit of some embodiments, the signal input module is further used to convert the signal format of the video source signal into a specified signal format.

[0011] In the image processing circuit of 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.

[0012] In the image processing circuit of some embodiments, the signal input module includes an input interface and a bridge unit, and the input interface is connected to the bridge unit;

[0013] The input interface is used to receive video source signals;

[0014] The bridge unit is used to identify the resolution of the video source signal, and 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.

[0015] In some embodiments of the image processing circuit, 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 respectively, and the switch is also connected to the conversion unit;

[0016] The switching switch is used to switch between forming a path between the image processing module and the conversion unit, or forming a path between the signal input module and the conversion unit;

[0017] The conversion unit is used to connect to the display screen, and convert the signal format of the received video source signal into the required signal format of the display screen and output it to the display screen.

[0018] In the image processing circuit of 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.

[0019] In the image processing circuit of some embodiments, the bridge unit is further 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 greater than the target resolution.

[0020] In the image processing circuit of some embodiments, the bridge unit is further configured to convert a signal format of the video source signal into a specified signal format.

[0021] In some embodiments of the image processing circuit, the input interface includes an HDMI interface.

[0022] An embodiment of the present application further provides a display device, which includes a display screen and the above-mentioned image processing circuit, wherein the image processing circuit is used to provide an image display signal for the display screen according to a video source signal.

[0023] An embodiment of the present application also provides an image processing method, which obtains a video source signal and identifies the resolution of the video source signal; when the resolution of the video source signal is different from the target resolution, the video source signal is amplified or scaled according to the target resolution, and the signal format of the video source signal is converted into the 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.

[0024] In some embodiments, the image processing circuit further comprises, after identifying the resolution of the video source signal:

[0025] 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.

[0026] In some embodiments, the image processing circuit further includes, before amplifying or scaling the video source signal according to the target resolution:

[0027] When the resolution of the video source signal is greater than the target resolution, the bandwidth of the video source signal is compressed.

[0028] In some embodiments, the image processing circuit further comprises, after identifying the resolution of the video source signal:

[0029] Convert the signal format of the video source signal to the specified signal format.

[0030] The present application provides an image processing circuit, method and display device, wherein the image processing circuit includes 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, 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 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, thereby improving the compatibility of the display screen with the display effects of different video source signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0032] Figure 1 A schematic diagram of the structure of a first embodiment of an image processing circuit provided in an embodiment of the present application.

[0033] Figure 2A schematic diagram of the structure of a second embodiment of the image processing circuit provided in an embodiment of the present application.

[0034] Figure 3 This is a schematic diagram of the structure of a signal input module and a signal output module in an image processing circuit provided in an embodiment of the present application.

[0035] Figure 4 A schematic diagram of the structure of an image processing module in an image processing circuit provided in an embodiment of the present application.

[0036] Figure 5 A flowchart of an image processing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. The features specified as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0039] See also Figure 1 , this embodiment provides an image processing circuit, which includes a signal input module, an image processing module and a signal output module connected in sequence, and the signal output module is used to connect to the 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 the target resolution to see whether 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 amplify or scale the video source signal according to the target resolution and then output it to the signal output module; 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 this embodiment, the target resolution is the display resolution of the display screen.

[0040] The image processing circuit in this 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, thereby improving the compatibility of the display screen with the display effects of different video source signals.

[0041] See also Figure 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 output module converts the signal format of the video source signal to obtain the required signal format of the display screen, thereby ensuring normal display of the display screen.

[0042] 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; conversely, 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 between the display screen and the video source signal. For example, if the display resolution of the display screen is 4K, the image processing module does not need to be processed for the 4K@60HZ video source signal. The signal input module can directly output the video source signal to the signal output module for signal format conversion and then display it on the display screen. For 2K@60HZ, 720P or 1080P video source signals, the image processing module is required to amplify the resolution of the video source signal and then transmit 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 and then transmit 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, thereby improving the compatibility of the display screen.

[0043] In some embodiments, the signal input module is further used to compress the bandwidth of the video source signal and then output it to the image processing module when the resolution of the video source signal is greater than 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.

[0044] In some embodiments, the signal input module is also used to convert the signal format of the video source signal into a specified signal format. For example, if the input signal is in a signal format corresponding to the HDMI2.0 interface, the signal input module can convert it into a signal format adapted to the MIPI interface, so as to adapt to the required signal format of the image processing module or the signal output module, thereby ensuring the normal display of the display screen.

[0045] See also Figure 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 used to receive a video source signal; the bridge unit is used to identify the resolution of the video source signal, and 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, 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.

[0046] 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. When the resolution of the video source signal is consistent with the target resolution, the video source signal is directly converted into a 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 into a signal format and then output to the image processing module, so that the image processing module can amplify or compress the video source signal.

[0047] Please also read Figure 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, such as HDMI2.0. The bridge unit can be used to convert the signal format of the video source signal into a specified signal format, such as a signal format adapted to 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 adapted to the HDMI interface into a signal format adapted to 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 adapted to the HDMI interface into a signal format adapted to the MIPI interface, such as completing the protocol conversion from the HDMI interface to the MIPI CSI interface. That is, the bridge unit in this embodiment needs to realize the functions of signal format conversion and signal recognition of the video source signal. Of course, in other embodiments, chips or circuit structures with the same functions can also be selected, and this application does not limit this.

[0048] In some embodiments, the bridge unit 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 greater than 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 compressing the bandwidth of the video source signal. For example, for a video source signal with a resolution greater than 4K and a refresh rate of 60Hz, it can be compressed into a 1080P@30Hz or 2K@60Hz video source signal, that is, the resolution and refresh rate can be compressed at the same time to compress the bandwidth, or the resolution or refresh rate can be compressed to compress the bandwidth. In this way, the video source signal is compressed by the bridge unit to facilitate adaptation with the image processing module, reduce the configuration of the image processing module, and play a role in reducing costs.

[0049] 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 respectively, and the switch is also connected to the conversion unit. The switch is an analog switch; the switch is used to switch the image processing module and the conversion unit to form a path, or to switch the signal input module and the conversion unit to form a path; the conversion unit is used to connect to the display screen, and convert the signal format of the received video source signal into the required signal format of the display screen and output it to the display screen.

[0050] When the switching 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 completing the protocol conversion from the HDMI interface to the MIPI DSI interface, and transmit the video source signal to the display screen through the conversion unit. When the switching switch forms a path between the image processing module and the conversion unit, the interface corresponding to 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 into the required signal format of the display screen. If the display screen supports the LVDS interface or the EDP interface, the conversion unit needs to complete the protocol conversion from the MIPI interface to the LVDS interface, or the protocol conversion from the MIPI interface to the EDP interface, thereby ensuring that the display screen can normally receive the display image signal to complete the display.

[0051] As an embodiment, the image processing module includes an application processor, namely an AP processor, and the corresponding 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 a switching switch. In this embodiment, the video source signal is amplified or compressed by the AP processor to ensure the display matching between the video source signal and the display, so that the video source signal can be displayed with maximum clarity and smoothness.

[0052] The embodiment of the present application also provides a display device, which includes the above-mentioned image processing circuit, through which the input video source signal is intelligently identified, and the video source signal of non-target resolution is amplified or compressed, so as to ensure that the display screen can display video sources of all resolutions with maximum clarity and smoothness, so as to meet the display requirements 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, it will not be repeated here.

[0053] See also Figure 5 The embodiment of the present application further provides an image processing method, which is applied to the above-mentioned image processing circuit; specifically, the image processing method includes:

[0054] 100. Acquire a video source signal and identify a resolution of the video source signal;

[0055] 200. When the resolution of the video source signal is different from the target resolution, the video source signal is amplified or scaled according to the target resolution, and the signal format of the video source signal is converted into the 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.

[0056] In this embodiment, the resolution of the video source signal obtained by the image processing circuit is identified. 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 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, thereby improving the compatibility of the display screen with the display effects of different video source signals.

[0057] In some embodiments, after step 100, the following further includes: 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. 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 matches the display resolution of the display screen, and the signal format of the video source signal is directly converted to obtain the required signal format of the display screen to ensure normal display of the display screen.

[0058] In some embodiments, before amplifying or scaling the video source signal according to the target resolution, the method further includes: when the resolution of the video source signal is greater than 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 compressing the bandwidth of the video source signal, so as to reduce the configuration of the image processing module and reduce the cost.

[0059] In some embodiments, after step 100, the process further includes: 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 in a signal format corresponding to the HDMI2.0 interface, the video source signal is converted into a signal format adapted to the MIPI interface to ensure the normal transmission of the video source signal.

[0060] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0061] The image processing circuit provided in the embodiments of the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with 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, characterized in that: It includes a signal input module, an image processing module and a signal output module connected in sequence; The signal input module is used to receive a video source signal, 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; The image processing module is used to amplify or scale the video source signal according to the target resolution and then output it to the signal output module; The signal output module is used to connect to a display screen, and convert the signal format of the received video source signal into a required signal format of the display screen and output it to the display screen; wherein the target resolution is the display resolution of the display screen.

2. The image processing circuit according to claim 1, characterized in that: The signal input module is further configured to compress the bandwidth of the video source signal and output the compressed bandwidth to the image processing module when the resolution of the video source signal is greater than the target resolution.

3. The image processing circuit according to claim 1, characterized in that: The signal input module is also used to convert the signal format of the video source signal into a specified signal format.

4. The image processing circuit according to claim 1, characterized in that: 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.

5. The image processing circuit according to any one of claims 1 to 4, characterized in that: The signal input module comprises an input interface and a bridge unit, wherein the input interface is connected to the bridge unit; The input interface is used to receive the video source signal; The bridge unit is used to identify the resolution of the video source signal, and when the resolution of the video source signal is different from the target resolution, the bridge unit outputs the video source signal to the image processing module.

6. The image processing circuit according to claim 4, characterized in that: 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 respectively, and the switch is also connected to the conversion unit; The switching switch is used to switch between forming a path between the image processing module and the conversion unit, or forming a path between 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 into a signal format required by the display screen and output it to the display screen.

7. The image processing circuit according to claim 5, characterized in that: 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.

8. The image processing circuit according to claim 5, characterized in that: The bridge unit is further configured to compress the bandwidth of the video source signal and output the compressed bandwidth to the image processing module when the resolution of the video source signal is greater than the target resolution.

9. The image processing circuit according to claim 5, characterized in that: The bridge unit is also used to convert the signal format of the video source signal into a specified signal format.

10. The image processing circuit according to claim 5, characterized in that: The input interface includes an HDMI interface.

11. A display device, characterized in that: The display device comprises: Display screen; The image processing circuit according to any one of claims 1 to 10, wherein the image processing circuit is used to provide an image display signal for the display screen according to a video source signal.

12. An image processing method, characterized in that: The image processing method comprises: Acquire a video source signal, and identify the resolution of the video source signal; When the resolution of the video source signal is different from the target resolution, the video source signal will be amplified or scaled according to the target resolution, and the signal format of the video source signal will be converted into the 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.

13. The image processing method according to claim 12, characterized in that: After identifying the resolution of the video source signal, the method further includes: 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 a required signal format of the display screen and output to the display screen.

14. The image processing method according to claim 12, characterized in that: Before the amplifying or scaling the video source signal according to the target resolution, the process further includes: When the resolution of the video source signal is greater than the target resolution, the bandwidth of the video source signal is compressed.

15. The image processing method according to claim 12, characterized in that: After identifying the resolution of the video source signal, the method further includes: The signal format of the video source signal is converted into a specified signal format.

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