Optical Trial Frame with Capacitive Sensing for Ergonomic Measurement
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Solution Overview
Problem
Conventional optical trial frames require orthoptists and ophthalmologists to bend over and strain to read printed scales for adjusting and measuring prescription values, which is cumbersome and inaccurate, lacking ergonomic handling and quick visualization of measurements.
Innovation Solution
A trial frame equipped with capacitive sensing means to detect and measure lateral and rotational positions of frames and lens holders, coupled with light sources for illumination and a computing processing unit to calculate and display interpupillary distance, allowing for precise and ergonomic adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If printed scales are provided on the trial frame for measurement, then measurement functionality is achieved, but readability and ease of operation deteriorate requiring orthoptists to bend over and strain to read
Solution Approach 1:
The patent replaces the mechanical printed scale reading system with an electronic sensing and display system. Capacitive sensors detect the position of adjustment mechanisms, and electronic displays present the measurement data, eliminating the need for physical scale reading and improving ergonomics while maintaining measurement accuracy.
Solution Approach 2:
The patent transitions from a two-dimensional printed scale on the frame surface to a digital display interface that can present measurement data in multiple dimensions (visual, numerical, graphical), making the information accessible without requiring the user to bend over or strain to read.
2Measurement precision
If multiple adjustment mechanisms are provided for precise positioning, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple adjustment mechanisms into a unified system with integrated capacitive sensing. Instead of separate sensing systems for each adjustment, a single capacitive sensing network monitors all positional changes, reducing overall system complexity while maintaining precise measurement capabilities across all adjustment degrees of freedom.
3Use of energy by moving object
If conventional printed scales are used for visualization, then no additional power is required, but readability and quick visualization deteriorate
Solution Approach 1:
The patent replaces passive mechanical printed scales with active electronic display systems that provide superior visualization of measurement data. The electronic displays can dynamically adjust brightness, contrast, and presentation format to ensure clear readability, compensating for the increased power consumption through efficient display technology.
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 easy and accurate measurement of adjustments, reducing the need to read printed scales, improving ergonomic handling, and facilitating quick visualization of measurements, enhancing the precision and efficiency of subjective refraction processes.
Implementation Method 1
capacitive sensing means configured to detect and measure at least one of: a lateral position of one of the frames; and, a rotational position of one of the lens holders
Data Source
AI summary
Embodiments relate to an optical trial frame that includes: left and right frames extending in the left and right directions respectively; a bridge located between and connected to the left and right frames such that the left and right frames can move relative to each other along a longitudinal axis of the bridge; left and right temples connected to the respective left and right frames; left and right lens holders rotatably coupled to the left and right frames respectively and configured to receive and retain lenses in use; and, capacitive sensing means configured to detect and measure at least one of: a lateral position of one of the frames; and, a rotational position of one of the lens holders.