Navigation System External Device Detection Color Coding
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Solution Overview
Problem
Users face confusion and difficulty in identifying whether route guidance information is being provided by an in-vehicle navigation device or a connected smartphone, leading to potential navigation errors and unclear fault determination when malfunctions occur.
Innovation Solution
A navigation system with an external device detection unit and output control unit that selectively outputs route guidance information from either the navigation device or the external device to a human-machine interface, using distinct display colors or voice types to differentiate between the two sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If route guidance information is provided by both in-vehicle navigation device and smartphone, then navigation functionality is enhanced and users can selectively utilize familiar smartphone or in-vehicle navigation device, but it becomes difficult for users to determine which device is currently providing route guidance information
Solution Approach 1:
The patent applies color changes to the display screen to indicate which device is providing route guidance information. When smartphone navigation is active, the display shows a first color (e.g., blue), and when in-vehicle navigation is active, it shows a second color (e.g., green). This visual color coding allows users to immediately identify the active navigation source without confusion, while maintaining the ability to use either device for navigation functionality.
2Ease of operation
If smartphone navigation function is used through connected smartphone, then users can utilize familiar smartphone navigation, but accuracy differences between in-vehicle GPS and smartphone GPS may lead to route deviation if source is not identified
Solution Approach 1:
The display color change mechanism provides immediate visual feedback about which GPS source is active, allowing users to understand whether they are using smartphone GPS or in-vehicle GPS. This helps users assess the reliability and accuracy characteristics of the current navigation source, preventing route deviation caused by misunderstanding the active navigation system.
3Adaptability or versatility
If navigation function is used through multiple devices, then navigation flexibility is improved, but fault determination and repair selection becomes difficult when malfunction occurs
Solution Approach 1:
The color-coded display system remains active until the moment of malfunction, providing clear indication of which device was providing navigation when the error occurred. This visual information helps users quickly determine whether to seek repair for the smartphone or the in-vehicle navigation device, facilitating proper fault determination and repair selection.
4Ease of operation
If display data from smartphone is shown on in-vehicle display, then navigation information is integrated, but it becomes difficult to distinguish at a glance which device is providing the navigation data
Solution Approach 1:
The patent overlays color indicators on the integrated display data to maintain source identification clarity. Even though navigation information from either device is displayed on the in-vehicle screen, the color coding (first color for smartphone source, second color for in-vehicle source) remains visible, allowing users to easily detect which device is providing the current route guidance information without separating the display data into different screens.
Data Source
AI summary
Whether route guidance information output from a navigation device to which an external device is connectable is provided by a navigation function of the external device or by that of the navigation device is able to be identified. A navigation device (100) that outputs route guidance information to HMI devices (104) to (110) and an external device (102) having a navigation function connected to the navigation device are included. The navigation device includes an external device detection means (322) that detects an input from the external device and an output control means (324) that controls output of route guidance information to the HMI devices. When the external device detection means has detected an input from the external device, the output control means outputs route guidance information provided by the navigation function included in the external device to the HMI devices in an output mode different from when route guidance information is output to the HMI devices by a navigation function included in the navigation device.