Spectacle Frame Posture Detection via Angle and Distance Measurement
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Solution Overview
Problem
Existing devices for determining the reading or writing mode of spectacle wearers fail to account for varying angles of incidence and do not distinguish between reading and writing modes, leading to inadequate posture evaluation and potential progression of myopia.
Innovation Solution
A device comprising means to measure distance and angle of inclination between the spectacle frame and a working plane, with controlling means to differentiate between reading and writing modes, and warning mechanisms to alert the wearer of improper posture, integrated into the spectacle frame or a reading medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single distance measurement device is used without angle detection, then the device complexity is reduced, but the measurement precision and ability to distinguish reading/writing modes deteriorates
Solution Approach 1:
The measurement function is segmented into two independent measurement systems: one for distance measurement and another for angle of inclination measurement. This allows each sensor to be optimized for its specific measurement task while working together to provide comprehensive posture analysis for distinguishing reading and writing modes.
Solution Approach 2:
The system transitions from one-dimensional distance measurement to two-dimensional measurement by adding angle of inclination detection. This dimensional expansion enables the system to differentiate between reading and writing postures that would otherwise have similar distance characteristics.
2Reliability
If angle of inclination measurement is added to distance measurement, then the ability to distinguish reading and writing modes is improved, but the device complexity increases
Solution Approach 1:
The controlling means serves multiple functions: it processes distance measurements, processes angle of inclination measurements, compares both parameters against reference values, and determines the reading or writing mode. This multi-functionality reduces the need for separate processing units for each measurement type.
Solution Approach 2:
The distance measurement means and angle of inclination measurement means are integrated into a unified measurement system with combined processing in the controlling means. This merging allows the system to evaluate both parameters simultaneously to reliably distinguish between reading and writing modes.
3Device complexity
If the device does not distinguish between reading and writing modes, then the device complexity is lower, but the ability to provide accurate posture evaluation and myopia prevention deteriorates
Solution Approach 1:
The system provides feedback by comparing real-time measurements of distance and angle of inclination against pre-established reference values for reading and writing modes. This feedback mechanism enables the system to identify improper posture and alert the user, thereby preventing myopia progression through continuous monitoring and correction guidance.
Data Source
AI summary
The invention relates to a device for determining a writing or reading mode of a person wearing spectacles including a frame and two lenses, the device comprising, according to the invention, means for measuring the distance between an element of the frame or the head and a working plane, means for measuring an angle of inclination (α) of a median plane of the two lenses relative to the vertical in a vertical median plane (P) of the head perpendicular to the median plane, and control means suitable for comparing the measured angle of inclination (α) with a set angle of inclination and for determining a reading mode or a writing mode of the person according to the comparison, the reading mode being associated with a predetermined set reading distance, and the writing mode being associated with a predetermined set writing distance.