Vehicle Map Display Switching for Intersection Guidance Continuity
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Solution Overview
Problem
The existing display control systems for vehicles, particularly in head-up displays, cause discomfort and confusion when the own vehicle mark disappears during transitions from wide-area to narrow-area displays, and fail to provide clear guidance during turns.
Innovation Solution
A display control apparatus that controls the image display in vehicles, switching from wide-area to narrow-area displays by erasing the own vehicle mark and replacing it with a guide mark having a similar shape and sense of depth, ensuring seamless visual recognition and providing directional guidance during turns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the own vehicle mark is erased during transition from wide-area to narrow-area display, then the visual recognition of the intersection is improved, but the viewer experiences discomfort and confusion
Solution Approach 1:
The patent creates a guide mark that copies the essential visual characteristics of the own vehicle mark (shape, size, sense of depth) and places it at the guide point on the map. This copy maintains visual continuity for the viewer while serving the new function of indicating the guide point, thereby resolving the contradiction between improving intersection recognition and avoiding viewer discomfort.
Solution Approach 2:
The guide mark acts as an intermediary element that bridges the transition between wide-area and narrow-area displays. It mediates the visual experience by providing a familiar visual anchor (similar to the own vehicle mark) while indicating the new focus point (guide point), thus preventing the harmful effect of sudden visual changes while enabling accurate navigation information presentation.
2Measurement precision
If the scale of the map is increased during narrow-area display, then the detail of the intersection is improved, but the own vehicle mark disappears causing visual discontinuity
Solution Approach 1:
Instead of displaying the actual own vehicle mark at the vehicle's real position (which would be off-screen during narrow-area display), the system creates a copy of the mark's visual appearance and places it at the guide point within the visible map area. This maintains visual continuity while enabling detailed intersection display.
Solution Approach 2:
The patent transitions the own vehicle mark from its original spatial dimension (at the vehicle's actual position on the map) to a new dimensional representation (at the guide point position). This dimensional transformation allows the mark to remain visible in the narrow-area display while still providing relevant navigation information.
3Measurement precision
If the own vehicle mark is displayed during turning, then the position indication is improved, but the directional guidance during turns is insufficient
Solution Approach 1:
The guide mark is designed to perform multiple functions simultaneously: it indicates the guide point position (spatial information) and provides directional guidance through its orientation and design ( navigational information). This multi-functionality resolves the contradiction by eliminating the need for separate position and direction indicators during turning maneuvers.
Solution Approach 2:
The patent merges the position indication function and directional guidance function into a single guide mark element. By combining these functions, the system provides both position and direction information without requiring multiple separate displays, thus preventing information loss while maintaining accurate position indication.
Data Source
AI summary
To ensure stable vision and reduce discomfort caused by the disappearance of an own vehicle mark when approaching an intersection, display control switches from a wide-area to a narrow-area map display. When the vehicle's distance to an intersection exceeds a first threshold, a control unit shows a first map at a wide scale, displaying the vehicle's position in a bird's-eye view of the surrounding area. As the vehicle approaches the intersection and the distance falls below the threshold, the control erases the vehicle mark and switches to a second map with a larger scale, focusing on the intersection vicinity. A guide mark then indicates the vehicle's traveling direction by adjusting the map's scale.