Vehicle HUD Directional Traffic Sign Display With Narrow FOV
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Solution Overview
Problem
Existing display apparatuses require a wide-angle view to project virtual images of traffic signs, leading to increased size and cost, especially when signs are near the edge of the forward view.
Innovation Solution
A display apparatus that includes an image processing unit to generate a projection image with a narrow-angle view, indicating the direction of traffic signs or target paths, allowing the signs to be displayed without increasing the angle of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide-angle view is projected to superimpose virtual images of traffic signs at positions visible in the forward view, then the traffic signs can be displayed even when they are near the edge of the forward view, but the size and cost of the display apparatus increase
Solution Approach 1:
The patent introduces a new dimension of directional indication by adding arrow symbols that point toward the location of traffic signs. Instead of relying solely on the wide-angle projection to cover all positions, the system uses directional vectors (arrows) to guide the driver's attention to edge-positioned signs, effectively solving the coverage problem without requiring a wider projection angle.
2Device complexity
If a narrow-angle view is projected, then the size and cost of the display apparatus are reduced, but traffic signs near the edge of the forward view cannot be displayed
Solution Approach 1:
The patent introduces arrow symbols as intermediary elements that mediate between the narrow-angle projection and the edge-positioned traffic signs. These arrows act as visual guides that bridge the gap, directing the driver's attention from the central projection area to the edge positions where traffic signs are located, thereby enabling the display of edge signs without requiring a wide-angle projection.
3Reliability
If the projection angle is increased to cover edge positions, then all traffic signs in the forward view are visible, but the manufacturing cost and size increase
Solution Approach 1:
The patent segments the information presentation into two components: the primary narrow-angle projection for central information and supplementary directional arrows for edge-positioned signs. This segmentation allows the system to use a compact narrow-angle projector while still providing comprehensive traffic sign information through the combined use of projection and directional indication.
Data Source
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AI summary
A display apparatus (1) according to an aspect of the present disclosure displays a virtual image of a projection image. The display apparatus includes an image generation unit (26) configured to generate the projection image including a predetermined image obtained based on a traffic sign, and a direction indication unit (25) configured to output either an indication direction in which a target path, to which the traffic sign is applied, is present or an indication direction in which the traffic sign is present, based on a position of the traffic sign and a position of a path in front of a moving body, and to cause the image generation unit to generate the projection image including the indication direction.