Contact Lens Sensor for Eyelid Detection
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Solution Overview
Problem
Existing technologies for detecting eyelid opening and closing are complex and degrade usability, particularly in contact lens type display devices, as they require external equipment and sensors, making them cumbersome for users.
Innovation Solution
A contact lens type display device with integrated light receiving elements, pressure sensors, and temperature sensors that detect eyelid opening and closing without the need for external devices, using reflected light and pressure changes to determine the user's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external detection devices (cameras, light sources, light reception units) are used to detect eyelid opening and closing, then detection precision is improved, but device complexity and usability are degraded
Solution Approach 1:
The patent combines multiple detection functions (light receiving element for reflected light detection, pressure sensor for contact pressure detection, temperature sensor for temperature detection) into a single integrated contact lens type display device. This merging eliminates the need for separate external detection devices while maintaining comprehensive detection capabilities for eyelid opening/closing states.
Solution Approach 2:
The contact lens type display device serves multiple functions: it acts as both a display device and a detection device. The light receiving element, pressure sensor, and temperature sensor within the device work together to detect eyelid opening/closing, making the device universal and eliminating the need for dedicated external detection equipment.
2Reliability
If multiple sensors (light receiving elements, pressure sensors, temperature sensors) are integrated into the contact lens device, then detection reliability is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple sensor types are merged into a single contact lens device structure, allowing them to be manufactured together as an integrated unit rather than assembled from separate components, thereby improving reliability while managing manufacturing complexity.
Solution Approach 2:
The contact lens device uses flexible thin film structures to house and integrate the light receiving element, pressure sensor, and temperature sensor, enabling manufacturing of multiple sensors within the constraints of a thin, flexible contact lens form factor.
3Ease of operation
If contact lens type display device is used for wireless operation, then ease of operation is improved, but the need for external detection equipment becomes a burden
Solution Approach 1:
The contact lens type display device performs self-detection of eyelid opening/closing using its own integrated sensors (light receiving element, pressure sensor, temperature sensor), eliminating the need for external detection equipment and maintaining wireless operation convenience without additional burdens.
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 precise detection of eyelid opening and closing with a simpler configuration, improving usability by eliminating the need for external sensors and enhancing user experience.
Implementation Method 1
when the eyelid of the user is open, since the infrared light is reflected by the eyeball, which has a smooth surface, a strong reflected light is obtained; however, when the eyelid is closed, since most of the infrared light is absorbed by the skin of the eyelid, the reflected light becomes weak
Implementation Method 2
by providing a camera which captures the eye of the user and analyzing an image of the eye that is captured by the camera
Implementation Method 3
A contact lens type display device with integrated light receiving elements, pressure sensors, and temperature sensors that detect eyelid opening and closing
Data Source
AI summary
A device for placement in contact with an eye of a user. The device includes at least one detector for measuring at least one property, and a signal processor for determining, based on the at least one property, whether the eye of the user is closed.