智能座舱黑屏、冻屏检测技术  

Intelligent cabin black screen and freezing screen detection technology

作　　者：张丁玲 刘凯[1] 吕惠清 夏欢 吴刚[1] Zhang Dinging;Liu Kai;Lyu Huiqing;Xia Huan;Wu Gang(Geely Automotive Research Institute(Ningbo)Co.,Ltd.,Intelligent Cabin Center,Software Development Department,Dalian 116085,China)

机构地区：[1]吉利汽车研究院完(宁波)有限公司智能座舱中心软件开发部,辽宁大连116085

出　　处：《汽车知识》2024年第5期96-100,共5页Auto Know

摘　　要：随着智能座舱功能越来越复杂,驱动屏幕数量也越来越多,由于各种原因不可避免地会出现黑屏、冻屏的情况。现有技术中,显示故障检测大多通过中央处理器(CPU)读取缓存中的数据,并逐像素点比较顿缓存中每个像素点的RGB存储值是否为黑色来判断是否发生黑屏。通过CPU逐像素点读取显示数据帧缓存中的值,增加了额外数据存储和维护的负担,并且运行时会消耗大量的CPU运算资源,效率难以提高,因此存在检测速度慢的问题。为了解决此问题,本文提出一种利用DPU的多输入签名寄存器(MISR)能力来实现对显示黑屏、冻屏的检测。该方法充分利用现有系统中硬件计算资源,配合软件实现算法,采用软硬件结合的方式,解决了黑屏、冻屏的判断问题。Nowadays,the functions of the intelligent cabin are becoming more and more complex,and the number of driving screens is also increasing,and there will inevitably be black screens and frozen screens for various reasons.In the existing technology,the display fault detection mostly reads the data in the FrameBuffer by the Central Processing Unit(CPU).Compare the RGB stored value of each pixel in the FrameBuffer pixel by pixel to determine whether a black screen occurs.The CPU reads the values in the display data Framebuffer pixel by pixel,which increases the burden of additional data storage and maintenance,and consumes a lot of CPU computing resources during operation,so the efficiency is difficult to improve,so there is a problem of slow detection speed.In order to solve this problem,this paper proposes a method that uses the MISR capability of Display Processing Unit(DPU)to realize the detection of black screen and frozen screen.This method makes full use of the hardware computing resources in the existing system and realizes the algorithm with the combination of software and hardware.The problem of judging black screen and frozen screen is solved.

关 键 词：黑屏 冻屏 DPU MISR 

分 类 号：U472.9[机械工程—车辆工程]