Variable Focus Lens Eye Tracking Depth Detection
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Solution Overview
Problem
Conventional static multi-focal lenses require users to adjust their viewing angle and head position for vision correction, which can be cumbersome, especially in environments with objects at multiple distances, and are difficult to use in dynamic settings like cars with GPS navigation.
Innovation Solution
A wearable computing device equipped with an eye tracking sensor and depth sensor that automatically adjusts a variable focus lens based on the user's gaze direction, allowing for seamless vision correction without the need for manual adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static multi-focal lenses are used to provide different levels of vision correction for different distances, then vision correction capability is improved, but ease of operation deteriorates because users must manually adjust viewing angle, head position, and eye position
Solution Approach 1:
The patent transitions from static multi-focal lenses to dynamic variable focus lenses that automatically adjust their optical properties. The system uses eye tracking sensors to detect gaze direction and depth sensors to determine object distance, then dynamically changes the lens focal length via electro-active polymer actuators to match the user's viewing needs, eliminating manual adjustment requirements.
Solution Approach 2:
The vision correction system performs self-adjustment by automatically detecting the user's gaze direction and object distance through integrated sensors, then autonomously modifying the lens focal length without requiring user intervention. The system serves itself by using its own sensor data to control its optical properties.
2Reliability
If static multi-focal lenses are used for vision correction, then different distance vision needs are addressed, but adaptability deteriorates in dynamic environments such as cars with GPS navigation screens
Solution Approach 1:
The system dynamically adapts to changing environmental conditions by continuously monitoring gaze direction and object distance through sensors, then adjusting the lens focal length in real-time. This dynamic response allows the system to handle diverse scenarios including reading, distance viewing, and intermediate tasks like GPS navigation without requiring manual lens changes or repositioning.
Solution Approach 2:
The variable focus lens system provides universal vision correction across multiple distance ranges and viewing conditions. A single lens can dynamically assume multiple focal lengths to serve different functions (near vision, intermediate vision, distance vision) that previously required separate static lenses or complex multi-focal designs.
3Ease of operation
If eye tracking and depth detection systems are implemented for automatic vision correction, then ease of operation is improved, but power consumption increases
Solution Approach 1:
The system employs periodic sampling of eye tracking and depth sensor data rather than continuous operation. The control processor activates sensors and processing only when needed to detect gaze changes or depth variations, then enters low-power states between measurements, reducing overall energy consumption while maintaining responsive vision correction.
Solution Approach 2:
The system uses feedback from eye tracking and depth sensors to intelligently control when active vision correction is needed. By monitoring gaze stability and object distance changes, the system can enter power-saving modes when no adjustment is required and activate corrective functions only when gaze or depth changes indicate a need for focal length adjustment.
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 natural and effortless vision correction, improving user acclimation to corrective lenses and enhancing vision through eye training, while reducing power consumption and improving battery life through power-saving strategies.
Implementation Method 1
a variable lens having a focal length that is electronically adjustable
Data Source
AI summary
Technologies for controlling vision correction include a wearable computing device having a variable lens, an eye tracking sensor, and a depth sensor. The focal length of the variable lens is electronically adjustable. The wearable computing device determines a gaze direction of a user as a function of eye tracking sensor data received from the eye tracking sensor. The distance to an object positioned in the gaze direction is determined as a function of depth data received from the depth sensor. A new focal length is determined as a function of the distance to the object, and the focal length of the variable lens is adjusted to the new focal length. The new focal length may be selected from a set of pre-defined focal lengths based on the distance to the object or calculated based on the distance to the object. Other embodiments are described and claimed.