Dynamic Eye Distance Adjustment in Data Glasses
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Solution Overview
Problem
Conventional data glasses require fixed connections due to a constant eye distance, limiting wearing comfort and application areas.
Innovation Solution
A method to dynamically determine and adjust the eye distance between the user's eye and the optical element of data glasses with a virtual retinal display, using a scanned laser beam, optical reproduction, and pupil position detection to calculate the instantaneous eye distance and dynamically correct the eye relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a constant eye distance is used in conventional data glasses, then the optical system can be simplified and manufactured, but the wearing comfort deteriorates and the glasses require firm fixation
Solution Approach 1:
The patent implements dynamic eye distance measurement and correction by using a laser beam to scan the user's eye and detect pupil position changes. The system continuously monitors eye movement and dynamically adjusts the virtual image position to maintain optimal focus, replacing the static constant eye distance approach with a dynamic adaptation mechanism that improves wearing comfort without complicating the core optical design
2Reliability
If firm fixation connections are used to maintain constant eye distance, then optical performance is ensured, but wearing comfort and suitability for daily use deteriorate
Solution Approach 1:
The system employs a feedback mechanism where a laser beam continuously scans the user's eye and detects pupil position changes. This information is fed back to the control unit, which adjusts the virtual image position in real-time to maintain optimal optical performance. This feedback loop replaces the need for firm fixation connections while ensuring consistent optical quality throughout wear
3Ease of operation
If dynamic eye distance determination is implemented, then wearing comfort and display quality improve, but device complexity increases
Solution Approach 1:
The patent uses a laser beam as an intermediary tool to measure eye distance and pupil position without requiring complex sensors or cameras directly in contact with the eye. The laser scanning system acts as a non-invasive mediator that provides measurement data to the control unit, enabling dynamic adjustment while adding minimal complexity to the overall device architecture
4Ease of operation
If the data glasses are allowed to slip freely for comfort, then wearing comfort improves, but display quality and reliability deteriorate
Solution Approach 1:
The system allows the glasses to slip freely for comfort while continuously measuring eye distance and pupil position using laser scanning. The control unit dynamically adjusts the virtual image position in real-time to compensate for any movement, ensuring that display quality and reliability are maintained regardless of the glasses' position on the user's face
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 solution enhances wearing comfort by eliminating the need for firm fixation, ensures high display quality and reliability even when the data glasses are slipping, and expands the range of suitable applications for data glasses.
Implementation Method 1
detecting a reflection signal reflected by the user's eye
Data Source
AI summary
A method at least for determining an eye distance between a user's eye and an optical element of an optical system of a pair of data glasses including a virtual retina display. The method includes: generating a scanned laser beam; optically reproducing the scanned laser beam; illuminating a user's eye by means of the optically reproduced scanned laser beam; detecting a reflection signal reflected by the user's eye; ascertaining pupil positions within the detected reflection signal; determining relative distances of the pupil positions, ascertained from the reflection signal, to one another and/or to a common origin point and/or to one or more reference points; and calculating an instantaneous eye distance from the determined relative distances.