Helmet HUD Guide Image Flicker Reduction via Priority Output Continuation
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Solution Overview
Problem
Existing display light emitting devices for helmets cause eye strain due to flickering guide images when switching between normal and priority output processes, especially when the user approaches a guide point, leading to a burden on the user's eyes.
Innovation Solution
The device implements a configuration where the image output section performs a normal output process and stop process repeatedly based on distance information, and when a priority display request is detected, it continues the priority output process until the normal output process starts, ensuring the guide image is kept displayed without immediate erasure, thereby reducing eye strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the normal output process is performed immediately after the priority output process, then the guide image can be displayed in response to user request, but the guide image disappears and reappears causing flickering that increases burden on user's eyes
Solution Approach 1:
The patent applies preliminary action by maintaining the guide image display during the interval estimation period. When a priority display request is detected, the system estimates the interval from the end of priority output process to the start of normal output process. If this interval is less than a predetermined value, the guide image is kept displayed continuously without interruption, preventing the harmful flickering effect while ensuring responsive operation.
2Object-affected harmful factors
If the guide image is displayed continuously to prevent flickering, then eye strain is reduced, but the normal output process cannot start immediately which may delay route information updates
Solution Approach 1:
The patent applies dynamics by making the guide image display duration flexible based on real-time conditions. The system dynamically adjusts the display behavior based on the estimated interval between priority and normal output processes. When the interval is short, the guide image is maintained continuously; when the interval is sufficient, the normal output process can start immediately. This dynamic adjustment resolves the contradiction between preventing flickering and maintaining timely information updates.
Data Source
AI summary
If a distance from a current position to a guide point is less than a predetermined distance, a normal output process and a stop process of a guide image are repeatedly performed. If a priority display request for a guide image is performed, a priority output process of the guide image is performed prior to the stop process. If an interval between the priority output process and the normal output process performed after the priority output process is short, the priority output process continues until the normal output process starts.