Vehicle-mounted USB charger supporting screen projection to AR glasses

Abstract

The utility model discloses a vehicle-mounted USB charger supporting screen projection to AR glasses, one end of the charger is connected with a vehicle-mounted main control chip, the other end of the charger is connected with the AR glasses, the charger comprises a power supply chip, the power supply chip is connected with a PD protocol controller, the power supply chip is connected with a power supply input connector, the power supply input connector is connected with an automobile battery, and the PD protocol controller is connected with the power supply input connector. The charger transmits handshake signals to the vehicle machine through the PD protocol controller via the type-c connector. The PD protocol controller is connected with the vehicle machine chip through a signal end, and transmits signals including identification of positive and negative signals of an inserted device, identification of screen projection channel signals supported by the inserted AR glasses and identification of whether the AR glasses are ready for screen projection to the vehicle machine main control chip through the type-c connector. According to the utility model, the screen projection function from the vehicle machine to the AR glasses can be effectively realized, the realization mode is simpler compared with the existing screen projection mode, a deserializer is not needed for derotation, the cost is low, the practicability is strong, and the interestingness of the vehicle is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of automotive electronic control, and particularly relates to a vehicle-mounted USB charger supporting screen mirroring to AR glasses. Background Art

[0002] Automobiles have become an indispensable means of transportation in people's lives. Currently, many devices can be realized through vehicle-mounted USB chargers, such as charging of electronic devices, reading of storage devices, etc. However, people are no longer satisfied with the original USB charger being limited to only two functions of charging and USB flash drive. Therefore, a USB charger with a screen mirroring function has emerged. It realizes screen mirroring to the car head unit by integrating a video signal serializer and setting a video signal deserializer in the car head unit, and converting multiple signals through the cooperation of the two. Although it further enriches the in-vehicle information entertainment for people. However, this form of screen mirroring conversion is complex and costly. With the improvement of the degree of intelligence, people have become accustomed to this kind of screen mirroring effect. How to further realize and enhance the entertainment experience of the car and meet people's more diverse needs has become the technical problem to be solved this time. Summary of the Utility Model

[0003] In view of the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a vehicle-mounted USB charger supporting screen mirroring to AR glasses, which realizes screen mirroring from the car head unit to the AR glasses and realizes more fun of the car.

[0004] The purpose of the utility model will be achieved through the following technical solutions:

[0005] A vehicle-mounted USB charger supporting screen mirroring to AR glasses, one end of the charger is connected to the car head unit main control chip through a second type-c connector, and the other end is connected to the AR glasses through a first type-c connector. The charger includes a power chip, the power chip is connected to a PD protocol controller, the power chip is connected to a power input connector, the power input connector is connected to the automotive battery, and the charger conveys a handshake signal to the car head unit via the PD protocol controller through the type-c connector.

[0006] Preferably, the PD protocol controller is connected to the car head unit chip through a signal terminal, and conveys signals including the signal for identifying the front and back of the inserted device, the signal for identifying the screen mirroring channel supported by the inserted AR glasses, and the signal for identifying whether the AR glasses are ready for screen mirroring to the car head unit main control chip via the type-c connector.

[0007] Preferably, the first type-c connector, the conversion driver, the second type-c connector and the car head unit main control chip are connected through a DP audio-video signal terminal.

[0008] Preferably, the PD protocol controller is connected to the transfer driver through a GPIO interface.

[0009] Preferably, the PD protocol controller is connected to the power chip through a GPIO interface and an I2C interface.

[0010] Preferably, the PD protocol controller is connected to the CC1 / CC2 communication channels of the first type-c connector.

[0011] The outstanding effect of the present utility model is at least reflected in that the present utility model can effectively realize the screen mirroring function from the vehicle-mounted computer to the AR glasses. The implementation method is simpler than the existing screen mirroring, eliminating the need for a deserializer for demultiplexing and conversion, with low cost, strong practicability, and enhancing the fun of the vehicle.

[0012] The following will further detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings of the embodiments, so that the technical solutions of the present utility model are easier to understand and master. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic diagram of the connection structure for realizing the screen mirroring function of the present utility model. Specific Embodiments

[0015] The present utility model provides a vehicle-mounted USB charger that supports screen mirroring to AR glasses. In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following will further explain the present utility model in conjunction with the attached Figure 1 drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0016] The utility model discloses a car USB charger that supports screen projection to AR glasses, one end of the charger is connected to the car main control chip through a second type-c connector, and the car main control chip is connected to the car's display screen. The video signal in the car main control chip can transmit the video signal to the USB charger through the second type-c connector. The other end of the charger is connected to the AR glasses through a first type-c connector, and the first type-c connector can provide charging, communication and screen projection functions for the AR glasses. The charger transmits signals to the car main control chip and the AR glasses respectively through the first type-c connector and the second type-c connector.

[0017] Specifically, the charger includes a power chip for powering the AR glasses, a PD protocol controller connection, and a conversion driver. The power chip is connected to the PD protocol controller, the power chip is connected to the power input connector, the power input connector is connected to the car battery, and the charger transmits a handshake signal to the car main control chip via the type-c connector through the PD protocol controller. Among them, the PD protocol controller connection can communicate with the AR glasses about the voltage and current that need to be provided, and perform a preliminary handshake for screen projection. The conversion driver can re-drive the audio and video signals from the car chip to provide better audio and video quality.

[0018] The PD protocol controller is connected to the vehicle chip through the signal end, and transmits signals including identifying the positive and negative signals of the inserted device, identifying the projection channel supported by the inserted AR glasses, and identifying whether the AR glasses are ready for projection. The above three signals correspond to signal 1, signal 2 and signal 3 in the embodiment figure respectively.

[0019] Furthermore, the first type-c connector, the conversion driver, the second type-c connector and the vehicle main control chip are connected through the DP audio and video signal terminal. The PD protocol controller is connected to the conversion driver through the GPIO interface. The PD protocol controller is connected to the power chip through the GPIO interface and the I2C interface. The PD protocol controller is connected to the CC1 / CC2 communication channel of the first type-c connector.

[0020] During use, the AR glasses are inserted into the first Type-c connector, and the USB charger charges the AR glasses. The PD protocol controller notifies the vehicle head unit of the front and back information of the AR glasses through Signal 1. When Signal 1 is high, it means the AR glasses are inserted face-up; when Signal 1 is low, it means the AR glasses are inserted face-down. The PD protocol controller conducts a PD handshake communication with the AR glasses. When the PD protocol controller identifies a channel that supports the screen mirroring function on the AR glasses, in this embodiment, if the channel that supports the screen mirroring function on the AR glasses is Channel 4, the USB charger raises Signal 2; if it is Channel 2, the USB charger lowers Signal 2. After the main control chip of the vehicle head unit learns of the change in Signal 2, the vehicle head unit configures its own screen mirroring function to the required channel. After the AR glasses complete their own configuration, they raise Signal 3 (in this embodiment, Signal 3 being high represents being ready for screen mirroring, and Signal 3 being low represents not being ready for screen mirroring). After the vehicle head unit learns that Signal 3 is raised, it starts a screen mirroring handshake with the AR glasses, that is, starts to screen mirror to the AR glasses. At this time, video and other images from the vehicle head unit screen can be enjoyed on the AR glasses, thus enhancing the viewing experience of the passengers in the vehicle.

[0021] There are still various implementation manners for the present utility model. All technical solutions formed by equivalent transformation or equivalent substitution fall within the protection scope of the present utility model.

Claims

1. An in-vehicle USB charger that supports screen mirroring to AR glasses, characterized in that: One end of the charger is connected to the vehicle main control chip through the second type-c connector, and the other end is connected to the AR glasses through the first type-c connector. The charger includes a power chip, which is connected to the PD protocol controller, which is connected to the power input connector, which is connected to the car battery. The charger transmits a handshake signal to the vehicle through the PD protocol controller via the type-c connector. The PD protocol controller is connected to the vehicle computer chip through the signal end, and transmits signals to the vehicle computer main control chip via the type-c connector, including identifying the positive and negative signals of the inserted device, identifying the projection channel signal supported by the inserted AR glasses, and identifying whether the AR glasses are ready for projection.

2. The in-vehicle USB charger for supporting screen mirroring to an AR glasses, characterized in that: The first type-c connector, the conversion driver, the second type-c connector and the vehicle main control chip are connected through the DP audio and video signal terminal.

3. The in-vehicle USB charger supporting screen mirroring to AR glasses according to claim 2, wherein: The PD protocol controller is connected to the converter driver via a GPIO interface.

4. The in-vehicle USB charger supporting screen mirroring to an AR glasses, as claimed in claim 3, wherein: The PD protocol controller is connected to the power chip via a GPIO interface and an I2C interface.

5. The in-vehicle USB charger supporting screen mirroring to an AR glasses, characterized in that: The PD protocol controller is connected to the CC1 / CC2 communication channel of the first type-c connector.

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