Decentered Micro-Display Binoculars for Natural Image Convergence
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Solution Overview
Problem
Existing digital binoculars used in ophthalmic applications often cause physiological discomfort such as fatigue, disorientation, or nausea due to imperfect convergence of projected images with the clinician's real-world view.
Innovation Solution
The use of horizontally decentered micro-displays within the digital binoculars, combined with optical and digital decentering techniques, to align images more naturally with the clinician's perspective, minimizing vergence-accommodation conflict.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If micro-displays are positioned centrally aligned with optical axes, then image display is straightforward, but convergence is poor causing physiological discomfort
Solution Approach 1:
The patent applies asymmetry by intentionally misaligning the micro-displays horizontally relative to the optical axes of the eyepieces. The micro-displays are positioned at specific horizontal offsets (e.g., 0.5mm to 2mm) from the optical axis, creating an asymmetric configuration that induces convergence. This asymmetric positioning transforms the symmetric, centrally-aligned conventional design into an asymmetric design that actively addresses convergence deficiencies and improves viewing comfort.
Solution Approach 2:
The patent changes the positional parameters of the micro-displays relative to the optical axes. By adjusting horizontal offset parameters within specific ranges (e.g., 0.1mm to 2mm) and controlling the angular orientation, the system optimizes convergence while maintaining image quality. This parameter optimization resolves the contradiction by finding the optimal balance between alignment simplicity and convergence effectiveness.
2Ease of operation
If digital binoculars present projected images, then viewing capability is provided, but vergence-accommodation conflict causes fatigue and disorientation
Solution Approach 1:
The patent converts the harmful vergence-accommodation conflict into a beneficial convergence effect. By deliberately misaligning the micro-displays, the system creates an artificial convergence stimulus that mimics natural viewing conditions. This transforms the conflict between projected image viewing and natural convergence into a benefit, where the misalignment itself becomes the mechanism for inducing appropriate eye convergence and reducing physiological discomfort.
Solution Approach 2:
The patent modifies the optical parameters of the display system by adjusting the horizontal position and angular orientation of the micro-displays. These parameter changes create an optical path that induces convergence, thereby reducing the vergence-accommodation conflict and associated physiological effects like fatigue and disorientation during prolonged viewing.
3Ease of operation
If micro-displays are decentered to improve convergence, then viewing comfort improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies partial action by implementing decentering within specific, moderate ranges rather than extreme misalignment. The horizontal offsets are kept within controlled ranges (e.g., 0.1mm to 2mm), which provides sufficient convergence improvement while avoiding excessive decentering that would compromise image quality or require ultra-precise manufacturing. This partial approach balances convergence benefits with manufacturing feasibility.
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 reduces short-term discomfort by improving image perception and long-term discomfort by minimizing fatigue and nausea, providing a more natural and comfortable viewing experience.
Implementation Method 1
the micro-displays are horizontally decentered relative to a corresponding optical axis of each of the front lenses
Data Source
AI summary
A digital ocular system for use with image sensors and an ophthalmic microscope includes a housing that connects to the microscope and defines a housing cavity, a first lens having a first optical axis, and a second lens having a second optical axis parallel to the first optical axis. A first micro-display is positioned within the housing cavity to present a first image from the image sensors. The first micro-display has a first center axis arranged at a predetermined angle with respect to the first optical axis. A second micro-display presents a second image from the image sensors. The second micro-display includes a second center axis arranged at the predetermined angle with respect to the second optical axis, such that the first and second micro-displays are horizontally decentered relative to the first and second optical axes, respectively.