Sight-Line Warning Display for Driver Door Exit Hazards
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Solution Overview
Problem
Current warning systems in vehicles often confuse occupants by providing unclear reasons for warnings, as the content of the warning is not immediately visible or understandable, especially when the occupant is not looking ahead, leading to difficulty in identifying the warning cause and appropriate action.
Innovation Solution
An information presentation device that selects display areas based on the occupant's line of sight, using a display processing unit to show information related to the vehicle's situation outside, such as warnings, in areas like the door display adjacent to the seat, ensuring the content is visible and understandable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If warning information is displayed in a fixed location (e.g., center display or meter display), then the display system is simple, but the occupant may not notice the warning when not looking in that direction, reducing warning effectiveness
Solution Approach 1:
The patent applies dynamics by making the display location adaptive rather than fixed. The display processing unit dynamically selects which display area (meter display, center display, or door display) to use based on real-time sight line direction detection. This allows the warning system to reliably present information in the occupant's field of view while maintaining a relatively simple overall system architecture through rule-based selection logic.
2Reliability
If multiple display areas are used to show information, then the recognizability of warnings is improved, but the device complexity increases
Solution Approach 1:
The patent segments the display function across multiple independent display areas (meter display, center display, door display), each capable of showing warning information. The sight line direction acquisition unit divides the viewing space into multiple regions, and the display processing unit selectively activates the appropriate segment based on where the occupant is looking, thereby improving recognizability without requiring all displays to operate simultaneously.
Solution Approach 2:
The patent applies local quality by providing different display options in different locations within the vehicle cabin. Each display area has its own characteristics and viewing angles. The system selects the display area that best matches the local viewing conditions determined by the occupant's sight line direction, ensuring optimal warning presentation for each specific viewing zone.
3Ease of operation
If the display position is fixed, then the system is easy to operate, but the occupant must actively look for the warning, increasing response time
Solution Approach 1:
The patent applies preliminary action by proactively determining the optimal display location before the occupant even notices the warning. The sight line direction acquisition unit continuously monitors where the occupant is looking, and the display processing unit pre-selects the appropriate display area based on this information. When a warning needs to be presented, it is already positioned in the occupant's field of view, eliminating the need for them to search for it and reducing response time while keeping the system easy to operate.
Data Source
AI summary
A human machine interface is configured to select an information display destination from among a plurality of display areas. The HCU acquires a sight line direction of a driver based on an image of an in-vehicle camera. The HCU displays, upon detecting a hop-off action of the driver based on an output signal of an in-vehicle sensor in a situation in which an attention target event such as a puddle, a step, other vehicle or the like exists on a road surface near a door of a driver's seat, in the display area corresponding to the driver's sight line direction, text or an image practically indicating (a) a content of an attention target event or (b) how to deal with a situation.