Head-Up Display Reference Pattern Depth Perception
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Solution Overview
Problem
Conventional vehicular head-up displays do not allow drivers to easily determine the distance of objects, such as pedestrians, from the windshield in the depth direction, which is crucial for safe navigation.
Innovation Solution
A display device that projects a light beam onto a medium, such as a windshield, and uses a controller to superimpose a reference pattern on objects in the field of view, allowing the driver to assess distances by highlighting corresponding parts of the pattern based on the object's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional head-up display shows only a marker image superimposed on the pedestrian, then the display structure remains simple, but the driver cannot easily determine the distance to the pedestrian in the depth direction
Solution Approach 1:
The patent applies dimensionality change by introducing a reference pattern with multiple depth layers. Instead of displaying only a 2D marker image, the system overlays a reference pattern containing markers at different depth positions, enabling the driver to perceive depth information by comparing the relative positions of the subject and reference markers across multiple depth planes. This resolves the contradiction by adding depth measurement capability without requiring complex 3D display hardware.
Solution Approach 2:
The reference pattern acts as an intermediary element between the display system and the driver's depth perception. By introducing this intermediate reference structure with known depth markers, the system enables indirect depth measurement through visual comparison, rather than requiring direct distance sensing technology. The reference pattern mediates the transformation from simple 2D display to depth-aware visualization.
2Loss of information
If a reference pattern with multiple depth markers is displayed to enable depth perception, then distance ascertainment improves, but the information processing and display complexity increases
Solution Approach 1:
The reference pattern is segmented into multiple discrete depth layers, each containing markers at specific depth positions. This segmentation allows the system to provide comprehensive depth information through distinct, easily distinguishable markers rather than requiring complex continuous depth mapping. Each segment represents a specific depth plane, making depth information processing more manageable and less computationally intensive.
Solution Approach 2:
Different regions of the reference pattern are assigned different depth qualities, with markers positioned at specific depth intervals. This local differentiation of depth information allows the driver to quickly assess distance by comparing the subject's position against the appropriate depth-level markers, reducing the cognitive load and processing complexity compared to uniform depth representation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables drivers to easily ascertain the distance of objects, like pedestrians or vehicles, from the display medium by displaying a virtual image with a reference pattern, enhancing safety and navigation through clear depth perception.
Implementation Method 1
a display unit that projects a light beam onto a display medium so as to be reflected from the display medium
Data Source
AI summary
Provided is a display device that allows a distance from a display medium to an object ahead to be easily ascertained. The display device includes a display unit that projects a light beam onto a windshield so as to be reflected from the windshield such that a virtual image is displayed in a space further than the windshield in the depth direction, and a controller that controls the display unit so that a reference pattern to be superimposed on a pedestrian present in the space is displayed so as to correspond to the position of the pedestrian.