Head-Mounted Display Distortion Correction Memory Management
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Solution Overview
Problem
Conventional video see-through type head-mounted displays require paired head-mounted and control units, making it necessary to reconfigure distortion correction values when the head-mounted unit is exchanged, which is inconvenient due to individual differences in optical distortions.
Innovation Solution
The display apparatus and method configure the display unit and processing unit as independent devices, with each unit having unique memory for distortion correction data, allowing for selection and registration of unique information for each unit, enabling processing tailored to the specific display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the head-mounted unit and control unit are configured as paired devices with shared distortion correction data, then the system integration is simplified, but the adaptability to individual display unit differences deteriorates
Solution Approach 1:
The patent divides the distortion correction system into two independent parts: the display unit with its own distortion correction data storage, and the control unit that manages multiple sets of correction data. This segmentation allows each display unit to have dedicated correction data while maintaining system simplicity through standardized interfaces.
Solution Approach 2:
The control unit is designed with universal functionality to manage distortion correction data for multiple different display units. It can store and apply different distortion correction data sets corresponding to various display units, making it adaptable to individual differences while maintaining a unified control architecture.
2Measurement precision
If distortion correction values are reconfigured when the head-mounted unit is exchanged, then the image display accuracy is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent implements preliminary action by pre-storing multiple sets of distortion correction data in the control unit, each corresponding to a different display unit. When a display unit is exchanged, the system automatically retrieves the pre-stored correction data matching that unit, eliminating the need for manual reconfiguration and maintaining high image accuracy.
3Manufacturing precision
If unique distortion correction data is stored for each display unit, then the manufacturing precision requirements are reduced, but the device complexity increases
Solution Approach 1:
The patent applies copying by creating and storing digital copies of distortion correction data for each display unit in the control unit's memory. Instead of requiring precise manufacturing to minimize optical variations, the system captures the actual distortion characteristics of each unit and stores correction data copies that compensate for individual differences, thereby reducing manufacturing precision requirements while managing complexity through efficient data storage and retrieval mechanisms.
Data Source
AI summary
When distortion correction table data held in a memory (140) are registered in table units (131, 132), the registered distortion correction table data are selected. When the distortion correction table data held in the memory are not registered, the distortion correction table data held in the memory (140) are selected, and are registered in the table units (131, 132).