AVN System USB Port Reset Prevention via Auxiliary Controller
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional audio video navigation (AVN) systems experience instability and quality degradation due to misrecognition and malfunction of USB connections, leading to unnecessary resets of SD cards, which disrupt map data transmission.
Innovation Solution
An integrated multimedia terminal system with a USB port, SD slot, AVN controller, hub, and auxiliary controller, where the auxiliary controller independently operates the USB port to prevent resets of the SD slot during USB misrecognition and malfunction, ensuring stable data transmission by reactivating the USB port without disconnecting the SD card.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the SD card is integrated into the AVN system for map data storage, then update convenience is improved, but system instability occurs when USB malfunction causes SD card reset
Solution Approach 1:
The patent separates USB and SD card connection management into independent control paths. The auxiliary controller handles USB operations while the main AVN controller manages SD card operations, ensuring that USB malfunctions do not trigger SD card resets and maintain system stability during updates.
Solution Approach 2:
The auxiliary controller is pre-configured with USB management capabilities to prevent USB malfunctions from affecting SD card operations. This proactive design cushions the system against USB-related instability, ensuring continuous SD card accessibility for map data during AVN system updates.
2Reliability
If an auxiliary controller is added to independently operate the USB port, then SD card reset is prevented, but device complexity increases
Solution Approach 1:
The auxiliary controller is designed with multi-functionality, handling both USB port management and SD card slot control through integrated circuits. This universal approach manages to reduce the increase in device complexity while maintaining the benefit of independent USB operation.
Solution Approach 2:
The patent merges USB and SD card control functions into a unified auxiliary controller architecture. By combining these functions in a single controller unit with integrated circuits, the design minimizes the complexity increase that would result from adding a completely separate control system.
Data Source
AI summary
An integrated multimedia system and a control method are provided, in which, when a USB port is reset during a misrecognition and malfunction of a USB connected to a port of an integrated multimedia terminal integrally provided with an SD slot, an SD slot is prevented from being reset to improve the stability and quality of an AVN system. The system includes an integrated multimedia terminal including a USB port for electrical connection of a USB and an SD slot for electrical connection of an SD card. An audio video navigation (AVN) controller detects the SD card and the USB, obtains data of the SD card and the USB and is connected to the integrated multimedia terminal. A hub electrically connects the SD slot and the USB port to the AVN controller and an auxiliary controller operates the USB port in response to a control signal transmitted via the hub.