HMD Diffraction Pattern Generation via Segmented Correction
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Solution Overview
Problem
Current display systems for head-mounted devices (HMDs) face challenges in efficiently computing and displaying diffraction patterns due to high computational loads, especially when multiple devices need to display individualized patterns, which can lead to increased computation costs and battery consumption.
Innovation Solution
A display device and system that utilize a basic diffraction pattern generated by a computer terminal and a correction diffraction pattern to create a combined diffraction pattern suitable for individual display terminals, reducing the computational load on the computer terminal and enabling efficient display of fictive images on HMDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a computer terminal generates diffraction patterns for multiple display terminals, then individualized display performance is improved, but computation cost and time increase significantly
Solution Approach 1:
The patent divides the diffraction pattern generation process into two independent stages: (1) generating a basic diffraction pattern from the original image, and (2) generating correction diffraction patterns for individual users' eyesight characteristics. This segmentation allows the computationally intensive basic pattern to be generated once and reused, while only the lighter correction patterns need to be computed for each user, significantly reducing total computation time and cost.
Solution Approach 2:
The patent performs preliminary generation of the basic diffraction pattern in advance, before knowing the specific eyesight characteristics of individual users. This basic pattern serves as a reusable foundation that can be combined with different correction patterns for different users, eliminating the need to regenerate the entire diffraction pattern for each user and thus reducing computation time.
2Manufacturing precision
If a computer terminal generates diffraction patterns for multiple display terminals, then individualized display performance is improved, but computation cost increases
Solution Approach 1:
The patent segments the diffraction pattern into a basic component and correction components. The basic diffraction pattern is generated once and can be reused across multiple users, while only the correction patterns (which account for individual eyesight differences) need to be computed separately for each user. This dramatically reduces the computational energy required compared to generating complete individualized patterns for every user.
Solution Approach 2:
The patent creates a reusable basic diffraction pattern that serves as a template or copy for multiple users. Instead of computing unique patterns from scratch for each user, the system copies the basic pattern and applies user-specific corrections, significantly reducing computation cost while maintaining individualized display performance.
3Manufacturing precision
If HMDs display diffraction patterns tailored to each user's eyesight, then display performance is improved, but device complexity increases
Solution Approach 1:
The patent divides the eyesight correction function into separate correction diffraction patterns that can be independently generated and applied. This segmentation allows the HMD to handle user-specific customization through simple pattern addition rather than complex real-time calculations, reducing device complexity while maintaining personalized display performance.
Solution Approach 2:
The patent creates a universal basic diffraction pattern that serves all users, combined with user-specific correction patterns. This universal component handles the common display requirements, while the correction patterns handle individual variations, allowing the system to achieve personalized performance without requiring each device to be fully customized for every user.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the appropriate display of fictive images on HMDs with reduced computational load, extending battery life and improving display performance by generating diffraction patterns tailored to each user's eyesight, thus enhancing the overall user experience.
Implementation Method 1
a spatial modulation element which diffracts the illumination light by displaying a diffraction pattern
Data Source
AI summary
A display device includes a light source which outputs laser light, an illumination optical system which emits the laser light as illumination light, a spatial modulation element which diffracts the illumination light by displaying a diffraction pattern, a diffraction pattern acquiring unit which acquires a basic diffraction pattern generated based on an image, and a diffraction pattern process unit which uses the basic diffraction pattern and a correction diffraction pattern for correcting the basic diffraction pattern to generate, as the diffraction pattern to be displayed on the spatial modulation element, a combined diffraction pattern obtained by correcting the basic diffraction pattern by the correction diffraction pattern. The spatial modulation element displays diffracted light, which is diffracted by displaying the combined diffraction pattern, to a user as a fictive image.