Vehicular Head-Up Display Distance-Adaptive Highlighting
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Solution Overview
Problem
Conventional vehicular display apparatuses struggle to maintain driver recognition of highlighting indications when the preceding vehicle is far away from the host vehicle, as the highlighting indications become too small and difficult to see.
Innovation Solution
A vehicular display apparatus that calculates the distance between the host vehicle and the preceding vehicle and adjusts the highlighting indication's size, spatial frequency, and brightness to maintain visibility, ensuring the indication remains recognizable even at longer distances by increasing its size, frequency, and brightness when the vehicle is far away.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the highlighting indication size is reduced when the preceding vehicle is far away, then the display fits better in the visual field, but the driver cannot recognize the highlighting indication
Solution Approach 1:
The patent applies dynamics by making the highlighting indication parameters (size, spatial frequency, brightness) dynamically adjustable based on the distance to the preceding vehicle. The control unit automatically modifies these parameters in real-time as the distance changes, ensuring the highlighting indication remains recognizable at any distance while adapting to the driver's visual field requirements.
Solution Approach 2:
The patent employs parameter changes by systematically adjusting multiple parameters of the highlighting indication (size, spatial frequency, and brightness) based on the detected distance to the preceding vehicle. When the vehicle is far away, the control unit increases size, spatial frequency, and brightness; when close, it decreases them, thereby resolving the contradiction between visibility and visual field fit.
2Reliability
If the highlighting indication size is increased when the preceding vehicle is far away, then the driver can recognize the indication, but the indication becomes too large and distracting when the vehicle is close
Solution Approach 1:
The system dynamically adjusts the highlighting indication parameters based on real-time distance measurements. When the preceding vehicle is far away, the indication is enlarged with increased size, spatial frequency, and brightness for better recognition. When the vehicle approaches, the system automatically reduces these parameters, eliminating the distraction problem while maintaining recognition capability.
Solution Approach 2:
The control unit implements parameter changes by modifying the size, spatial frequency, and brightness of the highlighting indication according to the distance to the preceding vehicle. This ensures the indication is sufficiently large and prominent when needed for recognition at long distances, but becomes appropriately smaller and less intrusive when the vehicle is close, thereby preventing driver distraction.
3Device complexity
If the highlighting indication uses fixed parameters, then the system is simple to implement, but the indication visibility varies significantly with distance
Solution Approach 1:
The patent transitions from a static fixed-parameter system to a dynamic adaptive system. The control unit continuously monitors the distance to the preceding vehicle and automatically adjusts the highlighting indication parameters (size, spatial frequency, brightness) in real-time. This dynamic approach ensures consistent visibility and recognition of the highlighting indication across all distance conditions, resolving the reliability issue while adding manageable complexity.
Solution Approach 2:
The system implements parameter changes by systematically modifying the size, spatial frequency, and brightness of the highlighting indication based on the detected distance to the preceding vehicle. This adaptive parameter adjustment ensures the indication maintains optimal visibility regardless of distance, transforming the fixed-parameter simple system into a reliable distance-adaptive system that resolves the visibility variation problem.
Data Source
AI summary
A vehicular display apparatus, when a host vehicle follows a preceding vehicle in front, displays a highlighting indication used to highlight the preceding vehicle over the preceding vehicle in a superimposing manner. The vehicular display apparatus includes a preceding vehicle detector that detects the preceding vehicle travelling in front of the host vehicle, a preceding vehicle distance calculator that calculates a distance between the preceding vehicle detected by the preceding vehicle detector and the host vehicle, a highlighting indication setter that sets the highlighting indication to be displayed over the preceding vehicle in a superimposing manner, and causes a highlight level of the highlighting indication to be higher when the distance between the preceding vehicle and the host vehicle calculated by the preceding vehicle distance calculator is long than when the distance is short, and a head-up display.