AR Refraction Adjustment via Liquid Crystal Diopter Correction
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Solution Overview
Problem
Current augmented reality apparatuses are not designed for users with abnormal eyesight, requiring them to wear additional glasses for clear vision, which affects comfort and usability.
Innovation Solution
A method and device for refraction adjustment in augmented reality apparatuses that receive light rays from the user's eyes, determine the pupil distance, and generate a refraction correction signal to adjust the diopters using a refraction adjustment element, allowing for adaptive correction of myopia and hyperopia without additional glasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users with abnormal eyesight wear additional corrective glasses while using the augmented reality apparatus, then their vision can be corrected, but the comfort and usability of the apparatus is reduced
Solution Approach 1:
The patent combines the refraction adjustment function with the augmented reality apparatus by integrating a refraction adjustment element (such as a liquid crystal lens) directly into the optical path of the device. This merging eliminates the need for separate corrective glasses, allowing users with abnormal eyesight to achieve clear vision through the AR device without wearing additional external corrective lenses, thereby resolving the contradiction between vision correction effectiveness and ease of operation
Solution Approach 2:
The refraction adjustment element is designed to provide universal accommodation for users with different types of refractive errors (myopia, hyperopia, astigmatism). The system can dynamically adjust the refraction correction signal based on detected eye parameters, making the AR apparatus suitable for users with varying eyesight conditions without requiring device-specific modifications or additional accessories, thus improving both reliability and ease of operation across diverse user groups
2Adaptability or versatility
If a refraction adjustment element is integrated into the augmented reality apparatus, then users with abnormal eyesight can achieve clear vision without additional glasses, but the device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical refraction adjustment mechanisms (such as movable lenses or prisms requiring physical adjustment) with a liquid crystal-based refraction adjustment element. This element can dynamically change its optical properties through electrical control, eliminating complex mechanical structures while providing precise refraction correction. The liquid crystal lens can be controlled via refraction correction signals to adjust focal length and optical power, achieving adaptability for different eyesight conditions without significantly increasing device complexity
Solution Approach 2:
The system changes optical parameters (refraction correction signal, focal length, optical power) of the refraction adjustment element based on detected user eye characteristics. By dynamically adjusting these parameters through electrical control rather than mechanical modification, the system achieves high adaptability for various refractive errors while maintaining a compact and relatively simple device structure. The parameter changes are implemented through software-controlled liquid crystal modulation, avoiding complex mechanical adjustment mechanisms
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
Enables comfortable and effective diopter correction for users with varying eyesight, enhancing the usability of augmented reality apparatuses by eliminating the need for additional corrective lenses.
Implementation Method 1
generating a focal length adjustment signal according to the desired diopter(s) so that a focal length of the refraction adjustment element is adjusted to preliminarily correct the diopters of eyes
Implementation Method 2
generating an optical axis adjustment signal according to the pupil distance of the user so that an optical axis position of the refraction adjustment element is adjusted to secondarily correct the diopters of eyes
Data Source
AI summary
A method and device for refraction adjustment in an augmented reality apparatus, and an augmented reality apparatus. The method for refraction adjustment includes: receiving light rays reflected from eyes of a user wearing an augmented reality apparatus; determining a pupil distance of the user according to the reflected light rays; and generating a refraction correction signal according to the pupil distance of the user and a desired diopter(s) for correcting diopters of the user's eyes by means of a refraction adjustment element.