Vehicle Display System Dual Data Path Sensor Latency

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Solution Overview

Problem

Modern vehicle multimedia systems experience latency and delays in displaying sensor data, such as reversing camera images, due to multi-layer communication and lack of real-time capability, which can lead to unpredictable fluctuations and failure to meet legal display requirements.

Innovation Solution

A method utilizing a vehicle computer with two data paths to quickly transmit sensor data, where the first path ensures secure and timely data transmission and the second path maintains design specifications of the graphical user interface, allowing for synchronized display without interruptions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a single data path is used to transmit sensor data through the vehicle computer and user interface, then the system architecture remains simple, but latency and delays occur due to multi-layer communication and lack of real-time capability

Engineering Contradiction:

Improvedata transmission speedVSAvoiddata path structure

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The data transmission path is segmented into two separate paths: a first data path for time-critical sensor data that bypasses the user interface logical units, and a second data path for non-time-critical data that goes through the normal user interface processing. This segmentation allows time-critical data to be transmitted quickly without being blocked by UI operations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A display control unit is introduced as an intermediary component that receives sensor data directly from the sensor via the first data path and controls the display independently. This intermediary enables direct transmission of time-critical data without waiting for user interface processing, thereby reducing latency.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If virtual machines are used in the user interface, then the interface becomes more flexible and easier to program, but additional unavoidable latencies occur during garbage collection operations

Engineering Contradiction:

Improveuser interface programmingVSAvoidgarbage collection latency

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The system segments data transmission into two paths: one that bypasses the virtual machine-based user interface for time-critical data, and another that uses the user interface for non-time-critical data. This allows the virtual machine to continue providing flexibility and ease of programming while preventing it from causing latency in critical operations.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If buffered transitions are used in the multimedia system, then the system can handle large numbers of user inputs, but delays or interruptions occur in the display

Engineering Contradiction:

Improveuser input handlingVSAvoiddisplay delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system separates time-critical sensor data transmission from non-time-critical user interface operations by using two distinct data paths. The first data path transmits sensor data directly to the display control unit without being affected by buffered transitions or user input buffering, ensuring continuous and timely display of critical information.

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If the existing vehicle computer architecture is maintained, then development costs remain low, but real-time capability cannot be achieved without high-cost hardware modifications

Engineering Contradiction:

Improveconversion costVSAvoidreal-time capability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

A display control unit is introduced as an intermediary that receives sensor data directly from the sensor and controls the display independently of the existing vehicle computer's user interface. This intermediary enables real-time display capability without requiring expensive hardware modifications to the existing vehicle computer architecture.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system architecture is segmented so that time-critical sensor data transmission is separated from the main vehicle computer's user interface processing. The first data path provides a dedicated route for real-time data, while the second data path maintains compatibility with the existing vehicle computer system, enabling real-time capability without complete architectural overhaul.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS10950203B2Method and display system for displaying sensor data from a sensor device on a display device, and motor vehicle having a display system

Publication Date: 2021.03.16 AUDI AG

AI summary

When a display query is received, the display query is evaluated and sensor data is transmitted to a display control in a vehicle computer via a first data path and displayed on a display device. A graphical user interface is loaded and transmitted to the display control unit via a second data path. The graphical user interface is synchronized with the display of the sensor data and the synchronized graphical user interface is displayed with the sensor data on the display device.