Femtoprojector Alignment Circuit for Contact Lens AR
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Solution Overview
Problem
Existing augmented reality (AR) systems with electronic contact lenses face challenges in aligning multiple femtoprojectors to ensure proper display of AR interfaces, particularly due to the need for precise image alignment and limited user input methods for calibration.
Innovation Solution
An alignment circuit within the contact lens adjusts the physical position or orientation of femtoprojectors using electroactive polymers or mechanical arms, allowing users to input alignment adjustments through smart devices, physical devices, voice commands, hand gestures, or eye gestures, enabling precise alignment of images projected onto the retina.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple femtoprojectors are used in a contact lens, then the AR interface can be displayed with multiple projectors covering different retinal areas, but the alignment precision of the projectors becomes difficult to maintain
Solution Approach 1:
The patent changes the physical parameters of the contact lens (curvature, diameter, thickness) to optimize projector alignment and image projection quality across different retinal areas, resolving the contradiction between using multiple projectors and maintaining alignment precision
Solution Approach 2:
The patent replaces manual mechanical alignment methods with automated optical alignment systems that use image capture and processing to precisely position multiple femtoprojectors relative to each other and the contact lens optical center
2Ease of operation
If traditional calibration methods are used, then the alignment process is simple, but the user input methods are limited and less intuitive
Solution Approach 1:
The patent implements multiple user input methods including voice commands, hand gestures, and eye gestures, making the calibration system universally accessible to users with different abilities and preferences while maintaining calibration simplicity
3Volume of moving object
If the contact lens is made smaller to fit the eye, then it is more comfortable to wear, but the projector alignment becomes more difficult to achieve
Solution Approach 1:
The patent optimizes the contact lens physical parameters (reducing diameter and thickness while maintaining curvature) to fit comfortably on the eye while incorporating alignment features that maintain projector precision despite the small scale
Solution Approach 2:
The patent extracts the alignment reference system from the femtoprojectors themselves and places it in the contact lens structure (alignment markers, optical center indicators), allowing independent verification and adjustment of projector positions relative to the lens
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
The solution ensures accurate alignment of images from multiple femtoprojectors, allowing for seamless stitching of overlapping images and proper display of AR interfaces, enhancing user experience and system reliability.
Implementation Method 1
The alignment circuit can include an electroactive polymer that, when activated, can move a femtoprojector relative to the contact lens
Data Source
AI summary
An electronic contact lens includes multiple femtoprojectors within the contact lens. Different femtoprojectors project images onto different portions of the retina. The images can be aligned by an alignment circuit within the contact lens. The alignment circuit can adjust the physical position or orientation of one or more femtoprojectors. Additionally, the alignment circuit can configure a location within a femtoprojector array from which an image is projected. A user can provide an input to align the femtoprojectors. For instance, a user can provide an input to adjust a location from which a first femtoprojector projects a test image until the test image is aligned with a test image projected by a second femtoprojector. The alignment circuit can, based on the user's input, determine alignment information for the femtoprojectors, and the contact lens can project subsequent images based on the alignment information.