Navigation Apparatus Stereo Display for Elevated Road Visibility
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Solution Overview
Problem
Existing navigation systems face challenges in visual perceptibility when displaying elevated and non-elevated roads, as the elevated road overlaps with the non-elevated road in a two-dimensional plane, making it difficult to distinguish the vehicle's position and reducing the visibility of the non-elevated road.
Innovation Solution
The navigation system improves visual perceptibility by using a stereo display method where the elevated road is semi-transmissively drawn on the front panel and the non-elevated road is normally drawn on the back panel, allowing the car mark on the non-elevated road to be easily visible, and by displaying leading guide maps on the front panel to enhance visual clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the elevated road is displayed on the front panel with high luminance to improve its visual perceptibility, then the visual perceptibility of the elevated road is improved, but the car mark on the non-elevated road becomes difficult to see
Solution Approach 1:
The patent transitions from a two-dimensional planar display to a three-dimensional stereo display using two panels positioned at different depths. The elevated road is displayed on the front panel while the non-elevated road and car mark are displayed on the back panel, creating depth separation that allows both to be visible simultaneously without luminance conflicts
Solution Approach 2:
The display is segmented into two separate panels (front and back) that can be independently controlled. This segmentation allows the elevated road on the front panel to have high luminance for visibility while the car mark on the back panel remains visible through the semi-transparent front panel, resolving the luminance conflict
2Illumination intensity
If the elevated road is displayed with high luminance on the front panel, then the visual perceptibility of the elevated road is improved, but the visual perceptibility of the non-elevated road is decreased
Solution Approach 1:
By utilizing the depth dimension with two panels at different positions, the elevated road is rendered on the front panel with high luminance while the non-elevated road is displayed on the back panel. The semi-transparent nature of the front panel allows the non-elevated road to remain visible through it, eliminating the need to reduce luminance contrast
Solution Approach 2:
The front panel acts as an intermediary that is semi-transparent to light. This allows the elevated road displayed on the front panel to be visible with high luminance while simultaneously allowing the non-elevated road on the back panel to be seen through the front panel, resolving the visibility conflict
3Quantity of substance
If the map and car mark are displayed together on the same display to provide comprehensive information, then the information completeness is improved, but the visual perceptibility of both elements is decreased
Solution Approach 1:
The patent separates the map display and car mark display into different depth planes using two panels. The map is displayed on the back panel while the car mark is displayed on the front panel, creating spatial separation that enhances the visual perceptibility of both elements while maintaining complete information display
Data Source
AI summary
A navigation apparatus (1) which includes a front image display (110) displaying an image of a front side and a back image display (112) displaying an image of a back side, the each image being one of images stereoscopically overlapped along the line of sight; a front image signal; a measuring unit (105) for measuring a current position of own vehicle; a map storage unit (103); a controller (101) for controlling each unit, wherein the controller (101) reads map data of a predetermined area and determines if an elevated road exists in the area, wherein when the elevated road exists, the controller (101) checks whether or not the current position of the own vehicle is on the elevated road, and wherein when the current position is not on the elevated road, the front image display (110) draws the image of the elevated road so that an image drawn on the back image display (112) can be visually percepted. A second embodiment comprises left eye and right eye image display means for stereoscopic display of the map data (instead of the front and back image displays).