Sound synchronization control system and method during display screen fault

Abstract

The invention discloses a sound synchronization control system and method during display screen fault, and belongs to the field of display screen control. The system comprises a display screen, a host and an external power amplifier which are connected in sequence, a processor is arranged in the display screen and is configured to be connected with the host, and the processor is used for carrying out display screen fault detection and feeding back a detection result to the host; and the host is used for controlling the display screen and the external power amplifier in real time, including controlling the display screen and the external power amplifier to synchronously play videos and audios, and synchronously controlling the external power amplifier to be turned off when detecting that the display screen fails. According to the invention, when the display screen fails, the sound can be automatically turned off, and the user experience is improved.

Description

Technical Field

[0001] The invention belongs to the field of display screen control, and in particular relates to a sound synchronization control system and method when a display screen fails. Background Art

[0002] When using a display screen, users usually need audio and video synchronization to ensure a good user experience. The prior art (CN117915139A) discloses a display device and an audio and video synchronization method. During the continuous playback of audio data, if the difference between the first original audio timestamp and the second original audio timestamp of the current frame audio data is greater than the first difference threshold, it is determined that the audio data has a timestamp jump. The calculated audio timestamp of the current frame audio data is reset to the first original audio timestamp. Finally, based on the size relationship between the original video timestamp of the current frame video data and the first original audio timestamp, the playback result of the current frame video data is determined. In this way, even if the timestamp of the audio data is reset, the audio timestamp that has jumped can be reset, and then the reset audio timestamp is used as a clock to calibrate the timestamp of the video data, thereby achieving audio and video synchronization.

[0003] Although the above-mentioned prior art realizes the synchronization of sound and picture, it does not take into account the uncomfortable experience caused by the playback of separate sound when the display screen fails. With the development of automobile technology, the intelligence is becoming more and more powerful, and there are more and more screens, but the probability of failure is also increasing. When the screen fails, the prior art does not add relevant fault diagnosis and logic processing when there is no abnormality in the screen control host, which will cause the external amplifier to have sound output, which makes the user feel like a supernatural event, bringing a bad experience and wasting resources. Summary of the invention

[0004] The present invention aims to overcome the deficiencies of the prior art and proposes a sound synchronization control system and method for display screen failure, so as to achieve the following objectives: when the display screen fails, the sound can be automatically turned off.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A sound synchronization control system for when a display screen fails, the system comprising a display screen, a host, and an external power amplifier connected in sequence, wherein the display screen has a built-in processor and is configured to be connected to the host, the processor is used to perform display screen failure detection and feed back the detection result to the host; the host is used to control the display screen and the external power amplifier in real time, including controlling the display screen and the external power amplifier to perform synchronous playback of video and audio, and synchronously controlling the external power amplifier to shut down when the display screen failure is detected.

[0007] Preferably, the host comprises a system on chip, and the system on chip is respectively connected to the processor and the external power amplifier for controlling the display screen and the external power amplifier in real time.

[0008] Preferably, the system on chip is connected to the processor via an LVDS bus and an IIC bus, wherein the LVDS bus is used for transmitting video data; and the IIC bus is used for transmitting control commands of the system on chip and feedback information of the processor.

[0009] Preferably, the system on chip is connected to the external power amplifier via an A2B bus and an IIC bus, wherein the A2B bus is used for transmitting audio data; and the IIC bus is used for transmitting control commands of the system on chip.

[0010] Preferably, the processor is a microcontroller, namely, MCU, and the MCU includes a single chip microcomputer.

[0011] Preferably, the host is a cockpit domain controller, namely, CDC.

[0012] At the same time, the present invention also proposes a sound synchronization control method when a display screen fails, the method is applied to the above-mentioned sound synchronization control system when a display screen fails, and the method comprises the following steps:

[0013] S1, detecting whether the display screen has a fault, wherein the fault includes a black screen;

[0014] S2. When a display screen failure is detected, the display screen is restarted through the host control, and the number of restarts is preset in advance;

[0015] S3. If the display screen still cannot resume working after a preset number of restarts, the host controls the external amplifier to shut down and not make any sound.

[0016] Preferably, in step S1, the method for detecting faults of the display screen includes detecting the state of the display screen in real time by a processor built into the display screen, and feeding back to the host when a fault is found.

[0017] Preferably, in step S1, the display screen fault detection method includes detecting the current output from the host to the display screen, and when the output current is less than a preset current threshold, it is regarded as a display screen fault.

[0018] The technical effects of the present invention are as follows: (1) the present invention can automatically turn off the sound when a display screen fails, thereby improving the user experience; (2) the system structure of the present invention is simple, which reduces the cost; the integration is high, which improves the control efficiency; (3) the method flow of the present invention is simple and efficient, the display screen fault detection method has a high accuracy rate, and automatic control is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a sound synchronization control system when a display screen fails according to an embodiment of the present invention;

[0020] Figure 2 The present invention is a flowchart of a method for controlling sound synchronization when a display screen fails according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention through the description of the embodiments with reference to the accompanying drawings, with the purpose of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate its implementation. In order to make the technical solution of the present invention clearer, the present invention is explained through the following embodiments:

[0022] A sound synchronization control system when a display screen fails, such as Figure 1 As shown, the system includes a display screen, a host, and an external power amplifier connected in sequence, wherein the display screen has a built-in processor and is configured to be connected to the host, the processor is used to detect display screen faults and feed back the detection results to the host; the host is used to control the display screen and the external power amplifier in real time, including controlling the display screen and the external power amplifier to play video and audio synchronously, and synchronously controlling the external power amplifier to shut down when the display screen fault is detected. The present invention can be applied to automobiles, and the corresponding display screen and external power amplifier are cockpit displays and vehicle speakers, respectively.

[0023] In an optional embodiment of the present invention, the processor built into the display screen is a microcontroller, i.e., MCU, and the MCU includes microcontroller chips such as single-chip microcomputers. This type of control chip has the advantages of high integration and small size. When implemented, it can be flexibly selected according to actual conditions on the premise of meeting the functional principles of the present invention. In this embodiment, the application of this type of chip can, on the one hand, reduce the circuit layout design, reduce costs, and make the display screen thinner, thereby meeting the current user's requirements for the size and thickness of the display screen; on the other hand, with the help of the efficient data processing capabilities of the microcontroller chip, the status of each component inside the display screen, such as the backlight, screen, power cord, etc., can be monitored in real time, so as to detect faults in time. In particular, when the display screen fails, the microcontroller chip needs to detect and feedback to the host in time.

[0024] In an optional embodiment of the present invention, the host is a cockpit domain controller, i.e., CDC, which is mainly used in the in-vehicle environment. This embodiment directly uses the existing cockpit domain controller in the vehicle as the host, avoiding the reselection of the host and the corresponding circuit layout design, thereby reducing costs. In specific implementation, the host can be flexibly selected according to actual conditions on the premise of satisfying the functional principles of the present invention.

[0025] In an optional embodiment of the present invention, the host includes a system on chip (SOC), which is connected to the processor and the external power amplifier respectively, and is used to control the display screen and the external power amplifier in real time. The control function of the host mainly depends on the SOC, which is an integrated controller packaged according to a dedicated target, and has the advantages of small size, complete functions, and effective improvement of control efficiency. In this embodiment, the SOC is used to control the display screen and the external power amplifier in real time, including the power of the display screen, controlling the audio and video signals to be transmitted to the external power amplifier and the display screen respectively for synchronous playback of audio and video, and synchronously controlling the external power amplifier to shut down when a fault of the display screen is detected.

[0026] Furthermore, the system on chip of this embodiment is connected to the processor via an LVDS bus and an IIC bus, wherein the LVDS bus is used to transmit video data to display the image on the display screen; the IIC bus is used to transmit the control commands of the system on chip (display screen lighting, restart, etc.) and the feedback information of the processor (display screen status data monitored by the processor, such as display screen failure, etc.); in addition, the system on chip of this embodiment is connected to the external power amplifier via an A2B bus and an IIC bus, wherein the A2B bus is used to transmit audio data to make sound through the external power amplifier; the IIC bus is used to transmit the control commands of the system on chip (external power amplifier opening, closing, etc.). This dual-bus design of the system on chip, the display screen, and the external power amplifier realizes the separation of control data (the bus transmission rate of control data is generally faster) and information data, making control commands and feedback more timely and improving system control efficiency. In an optional embodiment of the present invention, only an LVDS bus is set between the on-chip system and the display screen, and supports transparent transmission of IIC signals; similarly, only an A2B bus is set between the on-chip system and the external power amplifier, and supports transparent transmission of IIC signals. Such a design can save wiring harnesses and reduce costs.

[0027] At the same time, the present invention also proposes a sound synchronization control method when a display screen fails, which is applied to any of the above-mentioned sound synchronization control systems when a display screen fails. The whole method is simple and efficient, and the method can be integrated into an algorithm to realize automatic control, such as Figure 2 As shown, the method comprises the following steps:

[0028] S1. Detect whether the display screen has a fault, wherein the fault includes a black screen, etc. In this embodiment, the fault detection method of the display screen includes real-time detection of the state of the display screen by a processor built into the display screen, and feedback to the host when a fault is found. Step S1 also includes detecting the current output by the host to the display screen. When the output current is less than the preset current threshold, it is considered as a display screen fault. The principle is as follows: Under normal circumstances, the working current of the display screen is greater than 1A (different display screens have different sizes and different power consumption), but when the display screen is not working, only the built-in processor consumes current, which is very small, at the mA level, so it can be determined whether the display screen is working by detecting the current output by the host to the display screen. In specific implementation, the above two fault detection methods can be used simultaneously, and the two can verify each other, and at the same time, misjudgment and missed judgment can be avoided, thereby improving the detection accuracy.

[0029] S2. When a display screen failure is detected, the display screen is restarted through the host control, and the number of restarts is preset in advance. In this embodiment, the SOC restarts the display screen through an IIC signal, restarts the display screen and sets the number of restarts to three times.

[0030] S3. When the display screen still cannot resume working after a preset number of restarts, the host controls the external power amplifier to turn off and not make any sound. In this embodiment, the SOC turns off the external power amplifier through an IIC signal, so that the external power amplifier does not make any sound.

[0031] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A sound synchronization control system for display screen failure, characterized in that: The system includes a display screen, a host, and an external power amplifier connected in sequence, wherein the display screen has a built-in processor and is configured to be connected to the host, the processor is used to perform display screen fault detection and feed back the detection result to the host; the host is used to control the display screen and the external power amplifier in real time, including controlling the display screen and the external power amplifier to perform synchronous playback of video and audio, and synchronously controlling the external power amplifier to shut down when a display screen fault is detected.

2. The sound synchronization control system for display screen failure according to claim 1, characterized in that: The host comprises a system on chip, and the system on chip is connected to the processor and the external power amplifier respectively, and is used for controlling the display screen and the external power amplifier in real time.

3. The sound synchronization control system for display screen failure according to claim 2, characterized in that: The system on chip is connected to the processor via an LVDS bus and an IIC bus, wherein the LVDS bus is used for transmitting video data; and the IIC bus is used for transmitting control commands of the system on chip and feedback information of the processor.

4. The sound synchronization control system for display screen failure according to claim 2, characterized in that: The system on chip is connected to the external power amplifier via an A2B bus and an IIC bus, wherein the A2B bus is used for transmitting audio data; and the IIC bus is used for transmitting control commands of the system on chip.

5. A sound synchronization control system for display screen failure according to claims 1-4, characterized in that: The processor is a microcontroller, namely, MCU, and the MCU includes a single chip microcomputer.

6. A sound synchronization control system for display screen failure according to claims 1-4, characterized in that: The host is a cockpit domain controller, namely CDC.

7. A sound synchronization control method when a display screen fails, characterized in that: The method is applied to a sound synchronization control system when a display screen fails according to any one of claims 1 to 6, and the method comprises the following steps: S1, detecting whether the display screen has a fault, wherein the fault includes a black screen; S2. When a display screen failure is detected, the display screen is restarted through the host control, and the number of restarts is preset in advance; S3. If the display screen still cannot resume working after a preset number of restarts, the host controls the external amplifier to shut down and not make any sound.

8. The sound synchronization control method when a display screen fails according to claim 7, characterized in that: In the step S1, the method for detecting faults of the display screen includes detecting the screen status of the display screen in real time by a processor built into the display screen, and feeding back to the host when a fault is found.

9. The sound synchronization control method when a display screen fails according to claim 7, characterized in that: In the step S1, the display screen fault detection method includes detecting the current output from the host to the display screen. When the output current is less than a preset current threshold, it is regarded as a display screen fault.

Images