The invention provides an automobile instrument screen control circuit and a control method. The automobile instrument screen control circuit comprises a deserializer, a safety display management chip, a memory and an MCU (Microprogrammed Control Unit), the deserializer is used for receiving a video stream output by the vehicle-mounted control system and converting the video stream into an LVDS signal; the safety display management chip is used for receiving the LVDS signal and judging whether the LVDS signal has a fault or not; the MCU is used for acquiring the driving information from the CAN bus and storing the driving information into the memory through the safety display management chip; if the LVDS signal has a fault, the safety display management chip outputs a fault signal to the MCU, the MCU acquires driving information from the CAN bus according to the fault signal and stores the driving information into the memory, and the safety display management chip outputs the driving information to the instrument screen; and if the LVDS signal does not have the fault, the safety display management chip outputs the LVDS signal to the instrument screen. According to the invention, when the LVDS signal has a fault, the driving information can still be output to the instrument screen, so that a driver can know the vehicle condition conveniently.
本发明提供一种汽车仪表屏控制电路及控制方法,其包括解串器、安全显示管理芯片、存储器以及MCU;解串器用于接收车载控制系统输出的视频流,并将视频流转换为LVDS信号;安全显示管理芯片用于接收LVDS信号并判断LVDS信号是否存在故障;MCU用于从CAN总线中获取行车信息,并将行车信息通过安全显示管理芯片存储至存储器中;若LVDS信号存在故障,安全显示管理芯片输出故障信号至MCU,MCU根据故障信号从CAN总线中获取行车信息,并将行车信息存储至存储器中,安全显示管理芯片将行车信息输出至仪表屏;若LVDS信号不存在故障,安全显示管理芯片将LVDS信号输出至仪表屏。本发明可以在LVDS信号存在故障时,依然可以将行车信息输出至仪表屏,便于驾驶人员了解车况。
Automobile instrument screen control circuit and control method
汽车仪表屏控制电路及控制方法
2022-07-12
Patent
Electronic Resource
Chinese
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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