Virtual Image Display Correction Under Vehicle Vibration Lag

The patent introduces a vibration detector as an intermediary component that detects vibration in a specific frequency band (e.g., 2-10 Hz) before the correction processing device applies correction. This intermediary detection mechanism allows the system to identify problematic vibrations early and prevent them from causing enlarged correction errors, thereby resolving the time lag issue while maintaining display position accuracy.

The system performs preliminary detection of vibration in specific frequency bands before the vibration affects the display position. By detecting vibrations in advance and setting appropriate correction amounts based on this preliminary detection, the system prevents enlargement of correction errors that would otherwise occur due to time lag between vibration occurrence and correction application.

The patent applies local quality by making the correction processing selective rather than uniform. The correction processing device updates the correction amount only when the vibration detector determines that vibration in a specific frequency band has NOT been continuously generated. When such vibration is detected, the correction amount is maintained at the last determined value, creating a localized exception to the continuous update rule and preventing correction error enlargement in specific frequency conditions.

The system dynamically adjusts the correction strategy based on detected vibration characteristics. The correction processing device changes its behavior from continuous updating to maintaining the last correction amount depending on the presence of specific frequency band vibrations, making the correction process adaptive to real-time vibration conditions and preventing error enlargement.