Display terminal system and display terminal

Abstract

The utility model discloses a display terminal system and a display terminal. The display terminal comprises an HDMI interface, a processor, a conversion module and a display screen. The HDMI interface is used for connecting electronic equipment; the processor is used for generating a first HDMI signal; the first input end of the conversion module is connected with the HDMI interface, the second input end of the conversion module is connected with the first output end of the processor, and the conversion module is used for receiving the first HDMI signal and / or a second HDMI signal sent by the electronic equipment and converting the first HDMI signal or the second HDMI signal into a first image signal; the display screen is connected with the first output end of the conversion module and used for receiving the first image signal and displaying image information based on the first image signal. The processor carried by the display terminal supports output of HDMI signals, the conversion module can directly convert the HDMI signals sent by the processor or the HDMI signals input from the outside into image signal formats supported by the display screen by expanding the input interface of the conversion module, and the HDMI screen projection function of the large-size display terminal is achieved through a simple structure.

Description

Technical Field

[0001] The present application relates to the field of display terminals, and in particular to a display terminal system and a display terminal. Background Art

[0002] High Definition Multimedia Interface (HDMI) can send uncompressed audio and image signals at the same time. Display terminals such as TVs, monitors and projectors can display images based on HDMI signals transmitted by the HDMI interface.

[0003] Generally speaking, display terminals with small-size display screens do not need to have HDMI projection function, while display terminals with large-size display screens often need to have HDMI projection function. In related technologies, some large-size display terminals with touch functions, such as mobile smart screens and artificial intelligence & Internet of Things (AIoT) terminals, use the main control platform of small-size display terminals, and the processor only supports HDMI output and cannot process HDMI input signals, resulting in the inability of large-size display terminals to realize HDMI projection function. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a display terminal system and a display terminal, which are intended to realize the HDMI screen projection function of a large-size display terminal.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a display terminal, the display terminal comprising:

[0007] HDMI interface, used to connect electronic devices;

[0008] A processor, configured to generate a first HDMI signal;

[0009] a conversion module, wherein a first input end of the conversion module is connected to the HDMI interface, and a second input end of the conversion module is connected to a first output end of the processor, and is used to receive the first HDMI signal and / or the second HDMI signal sent by the electronic device, and convert the first HDMI signal or the second HDMI signal into a first image signal;

[0010] The display screen is connected to the first output end of the conversion module, and is used to receive the first image signal and display image information based on the first image signal.

[0011] In some embodiments, the conversion module includes:

[0012] a first multiplexer, wherein a first input end of the first multiplexer is connected to a first output end of the processor, and a second input end of the first multiplexer is connected to the HDMI interface, and is used to receive the first HDMI signal and / or the second HDMI signal, and select one of the HDMI signals for output;

[0013] The transmitter is arranged between the output end of the first multiplexer and the display screen, and is used for converting the received HDMI signal into the first image signal and sending the first image signal to the display screen.

[0014] In some embodiments, the display terminal further includes:

[0015] A second multiplexer, wherein a first input terminal of the second multiplexer is connected to a second output terminal of the processor, and a second input terminal of the second multiplexer is connected to the transmitter;

[0016] The processor is further used to generate a first audio signal and send the first audio signal to the second multiplexer; the transmitter is further used to extract a second audio signal from the received second HDMI signal and send the second audio signal to the second multiplexer;

[0017] The second multiplexer is used to receive the first audio signal and / or the second audio signal, and select one of the audio signals for output.

[0018] In some embodiments, the display terminal further includes:

[0019] A speaker, for playing audio based on the received analog audio signal;

[0020] The power amplifier is arranged between the output end of the second multiplexer and the speaker, and is used for converting the received audio signal into the analog audio signal and sending the analog audio signal to the speaker.

[0021] In some embodiments, the processor is further connected to a hot plug detection (HPD) pin of the HDMI interface, and the processor is further used to detect a voltage value of the HPD pin, wherein the voltage value of the HPD pin represents a connection relationship between the electronic device and the display terminal;

[0022] The processor is further configured to control the power amplifier to stop sending the analog audio signal based on a change in a voltage value of the HPD pin.

[0023] In some embodiments, the processor is an AIoT processor.

[0024] In some embodiments, the first image signal is a low-voltage differential signal (LVDS) signal or an embedded digital video (eDP) signal.

[0025] In some embodiments, the first multiplexer is configured as:

[0026] If it is determined that the second input end of the first multiplexer receives the second HDMI signal, outputting the second HDMI signal;

[0027] If it is determined that the second input terminal of the first multiplexer has not received the second HDMI signal, and the first input terminal of the first multiplexer has received the first HDMI signal, the first HDMI signal is output.

[0028] In some embodiments, the second multiplexer is configured as:

[0029] If it is determined that the second input end of the second multiplexer receives the second audio signal, outputting the second audio signal;

[0030] If it is determined that the second input terminal of the second multiplexer has not received the second audio signal, and the first input terminal of the second multiplexer has received the first audio signal, the first audio signal is output.

[0031] In a second aspect, an embodiment of the present application provides a display terminal system, the system comprising: the display terminal as described in the first aspect and an electronic device, the electronic device being used to send a second HDMI signal.

[0032] The display terminal provided in the embodiment of the present application includes: an HDMI interface, a processor, a conversion module and a display screen. The HDMI interface is used to connect an electronic device; the processor is used to generate a first HDMI signal; the first input end of the conversion module is connected to the HDMI interface, and the second input end of the conversion module is connected to the first output end of the processor, which is used to receive the first HDMI signal and / or the second HDMI signal sent by the electronic device, and convert the first HDMI signal or the second HDMI signal into a first image signal; the display screen is connected to the first output end of the conversion module, which is used to receive the first image signal and display image information based on the first image signal. In this way, the processor carried by the display terminal of the embodiment of the present application supports the output of HDMI signals, and by extending the input interface of the conversion module, the conversion module can directly convert the HDMI signal sent by the processor or the external input HDMI signal into an image signal format supported by the display screen, and realizes the HDMI projection function of the large-size display terminal with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram showing the structure of a terminal according to an embodiment of the present application;

[0034] Figure 2 This is a schematic diagram showing the structure of a terminal according to another embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of the structure of a display terminal according to another embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1. HDMI interface; 2. processor; 3. conversion module; 31. first multiplexer;

[0038] 32. Transmitter; 4. Display screen; 5. Electronic device; 6. Second multiplexer;

[0039] 7. Speaker; 8. Power amplifier. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] The present application embodiment provides a display terminal, such as Figure 1As shown, the display terminal includes: an HDMI interface 1, a processor 2, a conversion module 3 and a display screen 4. The HDMI interface 1 is used to connect an electronic device 5. The processor 2 is used to generate a first HDMI signal. The first input end of the conversion module 3 is connected to the HDMI interface 1, and the second input end of the conversion module 3 is connected to the first output end of the processor 2, for receiving the first HDMI signal and / or the second HDMI signal sent by the electronic device 5, and converting the first HDMI signal or the second HDMI signal into a first image signal. The display screen 4 is connected to the first output end of the conversion module 3, for receiving the first image signal, and displaying image information based on the first image signal.

[0043] Here, the display terminal of the embodiment of the present application is a mobile display terminal such as a mobile smart screen and an AIoT terminal. The display terminal provides video playback services to users based on the first HDMI signal generated by the processor 2.

[0044] Here, the electronic device 5 is used to send a second HDMI signal, and the display terminal of the embodiment of the present application can also provide a video playback service for the user based on the received second HDMI signal.

[0045] Here, processor 2 is one of the processors provided in the display terminal of the embodiment of the present application, and processor 2 generates a first HDMI signal based on network resources and / or local storage resources.

[0046] Exemplarily, processor 2 is an AIoT processor. In an application example, processor 2 is a system-level processor with model RK3576.

[0047] It should be noted that in addition to supporting HDMI output function, the AIoT processor also supports touch function. The display terminal equipped with the AIoT processor can provide not only video playback services but also touch interaction services to users.

[0048] It should be noted that for display terminals with large-size display screens, users usually require the display terminals to have an HDMI screen projection function; in related technologies, external input HDMI signals are usually transmitted to the processor of the display terminal, processed by the processor and then used for video playback. Since the main control platform equipped with an AIoT processor usually does not have an HDMI input function, large-size display terminals equipped with an AIoT processor usually cannot realize the HDMI screen projection function.

[0049] It should be noted that, based on the above-mentioned problem, the display terminal of the embodiment of the present application is provided with a conversion module 3. In addition to being able to convert the first HDMI signal generated by the processor 2 into an image signal format supported by the display screen 4, the conversion module 3 also supports receiving the second HDMI signal sent by the electronic device 3, and converting the second HDMI signal into an image signal format supported by the display screen 4.

[0050] It can be understood that since the signals sent by the processor 2 and the electronic device 5 in the embodiment of the present application are HDMI signals, the conversion module 3 does not need to have a complex format conversion function. It only needs to support the conversion of HDMI into an image signal format supported by the display screen 4, so as to realize the HDMI screen projection function of the large-size display terminal equipped with an AIoT processor.

[0051] Here, the HDMI interface 1 of the embodiment of the present application supports the HDMI2.1 specification and is compatible with the HDMI2.0 specification and the HDMI1.4 specification.

[0052] Here, the image resolution of the display screen 4 in the embodiment of the present application is 1080P or 4K.

[0053] Exemplarily, the first image signal is an LVDS signal or an eDP signal.

[0054] It should be noted that if the display screen 4 is a display screen with an image resolution of 1080P, the display screen 4 is provided with an LVDS interface, and the first image signal is an LVDS signal; if the display screen 4 is a display screen with an image resolution of 4K, the display screen 4 is provided with an eDP interface, and the first image signal is an eDP signal.

[0055] For example, Figure 2 As shown, the conversion module 3 includes: a first multiplexer 31 and a transmitter 32. The first input end of the first multiplexer 31 is connected to the first output end of the processor 2, and the second input end of the first multiplexer 31 is connected to the HDMI interface 1, for receiving the first HDMI signal and / or the second HDMI signal, and selecting one of the HDMI signals for output. The transmitter 32 is arranged between the output end of the first multiplexer 31 and the display screen 4, for converting the received HDMI signal into a first image signal, and sending the first image signal to the display screen 4.

[0056] It is understandable that when the processor 2 and the electronic device 5 send HDMI signals to the conversion module 3 at the same time, the first multiplexer 31 selects one of the HDMI signals to send to the transmitter 32 to avoid signal conflict.

[0057] Exemplarily, the first multiplexer 31 is configured as follows: if it is determined that the second input end of the first multiplexer 31 receives the second HDMI signal, then the second HDMI signal is output; if it is determined that the second input end of the first multiplexer 31 does not receive the second HDMI signal, and the first input end of the first multiplexer 31 receives the first HDMI signal, then the first HDMI signal is output.

[0058] It can be understood that the display terminal of the embodiment of the present application preferentially supports the HDMI screen projection function. When the first multiplexer 31 detects the input of the second HDMI signal, the second HDMI signal is output preferentially regardless of whether the first HDMI signal is received; when it is determined that there is no second HDMI signal input, the output state of the first multiplexer 31 is switched to the input signal output of the first input terminal.

[0059] In an application example of the present application, after the first multiplexer 31 detects that the input of the second HDMI signal reaches a set time length, it outputs the second HDMI signal to ensure stable input of the second HDMI signal.

[0060] Here, the transmitter 32 is connected to the image input interface of the display screen 4, wherein, if the image resolution of the display screen 4 is 1080P, the transmitter 32 is an HDMI-LVDS transmitter; if the image resolution of the display screen 4 is 4K, the transmitter 32 is an HDMI-eDP transmitter.

[0061] It can be understood that the embodiment of the present application utilizes a simple combination structure of the first multiplexer 31 and the transmitter 32 to implement the image playback function of the display terminal based on the external HDMI signal.

[0062] For example, Figure 3 As shown, the display terminal further includes: a second multiplexer 6, a speaker 7 and a power amplifier (PA) 8. The first input end of the second multiplexer 6 is connected to the second output end of the processor 2, and the second input end of the second multiplexer 6 is connected to the transmitter 32. The power amplifier 8 is arranged between the output end of the second multiplexer 6 and the speaker 7.

[0063] Among them, the processor 2 is also used to generate a first audio signal and send the first audio signal to the second multiplexer 6; the transmitter 32 is also used to extract the second audio signal from the received second HDMI signal and send the second audio signal to the second multiplexer 6; the second multiplexer 6 is used to receive the first audio signal and / or the second audio signal, and select one of the audio signals to output; the power amplifier 8 is used to convert the received audio signal into an analog audio signal, and send the analog audio signal to the speaker 7; the speaker 7 is used to play audio based on the received analog audio signal.

[0064] It is understandable that when the display terminal plays a video, in order to achieve consistency between sound and picture, it is necessary to ensure that the image signal played by the display screen 4 and the audio signal played by the speaker 7 are from the same signal source.

[0065] Here, the processor 2 may extract the first audio signal from the first HDMI signal, or may generate the first audio signal separately.

[0066] It is understandable that when the processor 2 and the transmitter 32 send audio signals to the second multiplexer 6 at the same time, the second multiplexer 6 selects one of the audio signals to send to the power amplifier 8 to avoid signal conflict.

[0067] Exemplarily, the second multiplexer 6 is configured as follows: if it is determined that the second input end of the second multiplexer 6 receives the second audio signal, then the second audio signal is output; if it is determined that the second input end of the second multiplexer 6 does not receive the second audio signal, and the first input end of the second multiplexer 6 receives the first audio signal, then the first audio signal is output.

[0068] It can be understood that since the display terminal of the embodiment of the present application preferentially supports the HDMI projection function, when the first multiplexer 31 detects the second HDMI signal input, it outputs the second HDMI signal to the transmitter 32. At this time, regardless of whether the second multiplexer 6 receives the first audio signal, in order to ensure the consistency of sound and picture, the second multiplexer 6 outputs the second audio signal sent by the transmitter 32; when there is no second HDMI signal input to the HDMI interface 1, the output state of the second multiplexer 6 is switched to the input signal output of the first output end.

[0069] In an application example of the present application, after the second multiplexer 6 detects that the input of the second audio signal reaches a set time length, it outputs the second audio signal to ensure stable input of the second audio signal.

[0070] Exemplarily, the processor 2 is also connected to the HPD pin of the HDMI interface 1, and the processor 2 is also used to detect the voltage value of the HPD pin, and the voltage value of the HPD pin represents the connection relationship between the electronic device 5 and the display terminal; wherein, the processor 2 is also used to control the power amplifier 8 to stop sending analog audio signals based on the change of the voltage value of the HPD pin.

[0071] It should be noted that pin 19 of the HDMI interface 1 is the HPD pin. When the electronic device 5 is connected to the HDMI interface 1, the voltage value of the HPD pin is higher; when the electronic device 5 is disconnected from the HDMI interface 1, the voltage value of the HPD pin is lower.

[0072] It is understandable that when the electronic device 5 is plugged in or out, the voltage value of the HPD pin will change. Based on the change in the voltage value of the HPD pin, the processor 2 can determine that the connection relationship between the electronic device 5 and the display terminal has changed, and the audio signal received by the power amplifier 8 will change. The processor 2 controls the power amplifier 8 to stop sending the analog audio signal to prevent the speaker 7 from generating a popping sound (POPnoise) due to the sudden switching of the audio signal received by the running power amplifier 8.

[0073] Specifically, when the electronic device 5 is connected to the HDMI interface 1, the voltage value of the HPD pin is greater than 2V; when the electronic device 5 is disconnected from the HDMI interface 1, the voltage value of the HPD pin is less than 0.8V.

[0074] In an application example of the present application, the power amplifier 8 includes a left channel power amplifier PA_L and a right channel power amplifier PA_R, the speaker 7 includes a left channel woofer_L, a left channel tweeter_L, a right channel woofer_R, and a right channel tweeter tweeter_R, and the left channel power amplifier PA_L and the right channel power amplifier PA_R are respectively connected to a pair of woofers and tweeters.

[0075] Exemplarily, the first audio signal and the second audio signal are Inter-IC Sound (I2S) signals.

[0076] It can be understood that the embodiment of the present application utilizes a simple combination structure of the conversion module 3 and the second multiplexer 6 to implement the video playback function of the display terminal based on the external HDMI signal.

[0077] The embodiment of the present application further provides a display terminal system, which includes the display terminal as described above and an electronic device 5, wherein the electronic device 5 is used to send a second HDMI signal.

[0078] Here, the electronic device 5 can be a terminal device such as a laptop, a camera, and a computer host, and the embodiment of the present application does not specifically limit the form of the electronic device 5. The electronic device 5 is provided with an interface corresponding to the HDMI interface 1 for connecting to the display terminal of the embodiment of the present application.

[0079] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0080] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0081] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display terminal, characterized in that: The display terminal comprises: HDMI interface, used to connect electronic devices; A processor, configured to generate a first HDMI signal; a conversion module, wherein a first input end of the conversion module is connected to the HDMI interface, and a second input end of the conversion module is connected to a first output end of the processor, and is used to receive the first HDMI signal and / or the second HDMI signal sent by the electronic device, and convert the first HDMI signal or the second HDMI signal into a first image signal; a display screen connected to the first output end of the conversion module, configured to receive the first image signal and display image information based on the first image signal; The processor is also connected to the hot plug detection pin of the HDMI interface; the processor is also used to detect the voltage value of the hot plug detection pin, and the voltage value of the hot plug detection pin represents the connection relationship between the electronic device and the display terminal.

2. The display terminal according to claim 1, characterized in that: The conversion module comprises: a first multiplexer, wherein a first input end of the first multiplexer is connected to a first output end of the processor, and a second input end of the first multiplexer is connected to the HDMI interface, and is used to receive the first HDMI signal and / or the second HDMI signal, and select one of the HDMI signals for output; The transmitter is arranged between the output end of the first multiplexer and the display screen, and is used for converting the received HDMI signal into the first image signal and sending the first image signal to the display screen.

3. The display terminal according to claim 2, characterized in that: The display terminal also includes: A second multiplexer, wherein a first input terminal of the second multiplexer is connected to a second output terminal of the processor, and a second input terminal of the second multiplexer is connected to the transmitter; The processor is further used to generate a first audio signal and send the first audio signal to the second multiplexer; the transmitter is further used to extract a second audio signal from the received second HDMI signal and send the second audio signal to the second multiplexer; The second multiplexer is used to receive the first audio signal and / or the second audio signal, and select one of the audio signals for output.

4. The display terminal according to claim 3, characterized in that: The display terminal also includes: A speaker, for playing audio based on the received analog audio signal; The power amplifier is arranged between the output end of the second multiplexer and the speaker, and is used for converting the received audio signal into the analog audio signal and sending the analog audio signal to the speaker.

5. The display terminal according to claim 4, characterized in that: The processor is further configured to control the power amplifier to stop sending the analog audio signal based on a change in a voltage value of the hot plug detection pin.

6. The display terminal according to claim 1, characterized in that: The processor is an AIoT processor.

7. The display terminal according to claim 1, characterized in that: The first image signal is an LVDS signal or an eDP signal.

8. The display terminal according to claim 2, characterized in that: The first multiplexer is configured as follows: If it is determined that the second input end of the first multiplexer receives the second HDMI signal, outputting the second HDMI signal; If it is determined that the second input terminal of the first multiplexer has not received the second HDMI signal, and the first input terminal of the first multiplexer has received the first HDMI signal, the first HDMI signal is output.

9. The display terminal according to claim 3, characterized in that: The second multiplexer is configured as follows: If it is determined that the second input end of the second multiplexer receives the second audio signal, outputting the second audio signal; If it is determined that the second input terminal of the second multiplexer has not received the second audio signal, and the first input terminal of the second multiplexer has received the first audio signal, the first audio signal is output.

10. A display terminal system, characterized in that: The system comprises: a display terminal as claimed in any one of claims 1 to 9 and an electronic device, wherein the electronic device is used to send a second HDMI signal.

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