Eyeglass Temple Sensor with Dual Active Areas for Wear Detection
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Solution Overview
Problem
Existing solutions for detecting whether electronic eyeglasses are being worn tend to produce a high number of false positives, making them unreliable for determining the correct wear status of the eyeglasses.
Innovation Solution
A device with a sensor accommodated inside the temple of the eyeglasses, featuring at least one first active area directed toward the head and one second active area directed outward, calculates a threshold value by comparing the values detected by these areas to determine if the eyeglasses are being worn, while self-calibrating to the user's head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch-sensitive areas or infrared sensors are used to detect eyeglasses wear status, then the device can provide wear detection functionality, but the number of false positives increases significantly
Solution Approach 1:
The sensor is divided into multiple independent active areas (first active area facing the head, second active area facing outward, and optionally third and fourth active areas) that independently detect signals from different directions. This segmentation allows the system to analyze spatial patterns of detected signals to distinguish between genuine wear status and false positive conditions.
Solution Approach 2:
Different active areas of the sensor are assigned different functional qualities based on their orientation. The first active area detects signals from the head direction when worn, while the second active area detects signals from outward directions when not worn. This local differentiation enables the system to interpret sensor readings in the context of spatial orientation, significantly reducing false positives.
2Reliability
If a single sensor area is used to detect wear status, then the device complexity is reduced, but the ability to discriminate between correct wear and other positions is insufficient
Solution Approach 1:
The detection capability is extended from a single-point measurement to a multi-dimensional spatial measurement by adding active areas oriented in different directions. This dimensional expansion allows the sensor to detect not only the presence of a signal but also the direction from which the signal originates, enabling discrimination between wear status and other positions without requiring complex mechanical structures.
3Measurement precision
If multiple sensor areas with different orientations are used, then false positives are reduced, but the manufacturing cost and complexity increase
Solution Approach 1:
Multiple active areas with different orientations are merged into a single integrated sensor component rather than using separate sensor modules. This consolidation achieves the functional benefits of multi-directional detection while simplifying the manufacturing process, reducing the number of separate components that need to be assembled, and lowering overall manufacturing complexity and cost.
Data Source
AI summary
A device for detecting the condition of eyeglasses being worn, which includes a sensor adapted to be accommodated inside a temple of a pair of eyeglasses and includes at least one first active area and at least one second active area. The first active area is adapted to be directed toward the head of the user, and the second active area is adapted to be directed outward.