Implementation method for inputting hardware architecture in USB OTG (Universal Serial Bus On-The-Go) mode of display equipment

Abstract

The invention relates to the technical field of display, in particular to an implementation method for inputting a display device into a hardware architecture in a USB OTG mode, audio and video data on a computer terminal are separated through software of a CPU, one path is directly transmitted to a projection chip to provide video information of a display, and the other path of audio information is directly played through the CPU. And a better audio effect is ensured under the combination of the CPU performance and the Android system. According to the invention, the HDMI-to-USB OTG video acquisition card is adopted, a screen on a computer terminal can be directly projected to a novel display device, a hardware architecture is simpler and not easy to make mistakes, the sound quality effect expressive force is higher, and the stability, fidelity and experience of watching content through computer screen projection are met.

Description

Technical Field

[0001] The invention relates to the field of display technology, in particular to a method for realizing a USB OTG input hardware architecture of a display device. Background Art

[0002] With the rapid development of science and technology, product technologies in various fields are rapidly iterating. Among them, large-screen display technologies are widely used because they are close to people's lives, such as projectors and large-screen TVs. This type of new display device uses AR optical technology to display the content that the computer terminal needs to display on a virtual screen 6 meters away. The 151-inch large screen and immersive experience bring consumers a different experience.

[0003] The architecture of traditional TVs and projectors does not have the Android system, so there is no need to consider the switching between Android and computer signals. However, the architecture of smart TVs and smart projectors needs to deal with the switching between Android systems and computer signals.

[0004] In the process of signal switching, in order to solve the signal delay problem caused by switching, the existing technology usually uses hardware to implement the entire link from the computer to the motherboard chip and then to the new display device. Such a structure will inevitably lead to a more complex hardware architecture, and such an architecture will have two sets of audio paths, resulting in differences in sound quality and even certain stability issues.

[0005] Based on the above reasons, the present invention designs a method for implementing the USB OTG input hardware architecture of a display device, which simplifies the hardware architecture while also utilizing the functions of the CPU and the running Android system to achieve better audio effects. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for implementing a USB OTG input hardware architecture of a display device, which simplifies the hardware architecture while also utilizing the functions of the CPU and the running Android system to achieve better audio effects.

[0007] In order to achieve the above object, the present invention provides a method for implementing a USB OTG input hardware architecture of a display device, wherein a video capture card that converts an HDMI interface to a USB OTG interface is connected to an HDMI interface of a computer and a USB port of a display device respectively through wired transmission, so as to project the screen of the computer directly onto the display device; The hardware architecture of the display device is: the USB interface is connected to the CPU, the CPU is connected to the projection chip through HDMI, the projection chip is connected to the display screen through MIPI, and the CPU is connected to the left and right channel speakers through the power amplifier interface PA.

[0008] The display device configuration APP is used to monitor the USB port and decode the audio and video data of the UVC and UAC protocols transmitted from the USB and display them on the display of the display device.

[0009] The CPU separates the video signal and the audio signal through software.

[0010] The signal transmitted by the CPU to HDMI does not include audio data.

[0011] The CPU separates the audio information through software and uses it to directly drive two speakers to achieve an upgrade in audio effects.

[0012] Compared with the prior art, the present invention uses a video capture card that converts HDMI to USB OTG to directly project the screen on the computer terminal to the new display device, and decodes and displays the audio and video data with UVC and UAC protocols in the computer terminal on the display of the new display device through the APP configured in the display device to the USB port. The hardware structure in the display device only needs to process the audio and video data separately through the software in the CPU, and the video data is directly transmitted to the liquid crystal module in the display screen through the projection chip through MIPI, and the audio data can achieve better audio effects under the processing of the CPU's own performance and the running Android system, such as better tuning effects and wider range of bass and treble.

[0013] Therefore, the present invention simplifies the internal hardware structure of the display device as a whole, and will not cause hardware instability problems due to additional connections. In the absence of too high a delay requirement, when only watching the projected content of the computer terminal, the resolution and screen refresh speed will not be reduced. Compared with the full-link adoption of a pure hardware architecture, the stability and cost controllability are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a physical connection schematic diagram of the present invention.

[0015] Figure 2 This is a block diagram of the hardware circuit architecture of the present invention. DETAILED DESCRIPTION

[0016] See also Figure 1-2 The present invention is now further described in conjunction with the accompanying drawings. The present invention provides a method for implementing a USB OTG input hardware architecture of a display device: Through wired transmission, connect the video capture card that converts the HDMI interface to the USB OTG interface to the HDMI interface of the computer and the USB port of the display device respectively, so as to project the computer screen directly to the display device; The hardware architecture of the display device is: the USB interface is connected to the CPU, the CPU is connected to the projection chip through HDMI, the projection chip is connected to the display screen through MIPI, and the CPU is connected to the left and right channel speakers through the power amplifier interface PA.

[0017] The display device configuration APP is used to monitor the USB port and decode the audio and video data of the UVC and UAC protocols transmitted from the USB and display them on the display of the display device.

[0018] The CPU separates the video signal and the audio signal through software.

[0019] The signal transmitted by the CPU to HDMI does not include audio data.

[0020] The CPU separates the audio information through software and uses it to directly drive two speakers to achieve an upgrade in audio effects.

[0021] Working principle description: Insert the video capture card that converts the HDMI interface to the USB OTG interface from the USB port of the display device to transmit the video signal to the display device. The display device obtains the video data by decoding UAV and UVC, and sends the video data to the projection chip D300 through the HDMI signal line. The projection chip D3000 converts the signal into a MIPI signal and drives the display on the device to display normally. In this process, since the software running on the CPU separates the video signal and the audio signal, there is no audio data on the HDMI signal line behind the CPU, so the input signal provided by the projection chip D3000 to the LCD module in the display does not contain audio information. The software on the CPU separates the audio information separately and plays it through the two left and right channel separated speakers driven by the CPU.

[0022] The above are only preferred embodiments of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0023] The present invention solves the problem that the entire link from the computer to the motherboard chip and then to the display device in the prior art switching of the display device signal is implemented by hardware, which makes the hardware structure more complex and less stable, and the audio line may be split and cause the sound quality difference. The audio and video data on the computer terminal are separated by the CPU software, and one path is directly transmitted to the projection chip to provide the display video information, while the audio information is directly played through the CPU through another path, which ensures better audio effect under the combination of CPU performance and Android system. The present invention adopts an HDMI to USB OTG video capture card, which can directly project the screen on the computer terminal to the new display device. The hardware architecture is simpler and less prone to errors, and the sound quality effect is more expressive, which meets the stability, fidelity and experience of viewing content on the computer screen.

Claims

1. A method for implementing a USB OTG input hardware architecture of a display device, characterized in that: Through wired transmission, connect the video capture card that converts the HDMI interface to the USB OTG interface to the HDMI interface of the computer and the USB port of the display device respectively, so as to project the computer screen directly to the display device; The hardware architecture of the display device is as follows: a USB interface is connected to a CPU, the CPU is connected to a projection chip via HDMI, the projection chip is connected to a display screen via MIPI, and the CPU is connected to left and right channel speakers via a power amplifier interface PA.

2. The method for implementing the USB OTG input hardware architecture of the display device according to claim 1, characterized in that: The display device configures the APP to monitor the USB port, and decodes and displays the audio and video data of the UVC and UAC protocols transmitted from the USB on the display of the display device.

3. The method for implementing the USB OTG input hardware architecture of the display device according to claim 1, characterized in that: The CPU separates the video signal and the audio signal through software.

4. The method for implementing the USB OTG input hardware architecture of the display device according to claim 3, characterized in that: The signal transmitted by the CPU to the HDMI does not include audio data.

5. The method for implementing the USB OTG input hardware architecture of the display device according to claim 4, characterized in that: The CPU separates the audio information separately through software, and uses it to directly drive two speakers to achieve an upgrade of the audio effect.

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