Eye Tracking Device for Accessible Cursor Control
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Solution Overview
Problem
Conventional computer input devices, such as mice, are difficult for individuals with motion disabilities to use, necessitating the development of alternative methods for controlling devices based on eye movements and blinking.
Innovation Solution
A method and device that utilize eye movement and blinking information to generate control commands, allowing users to control devices by tracking gaze positions, movement directions, and blinking actions, enabling precise cursor control and command execution on a display screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional mice (ball mouse, optical mouse, gyroscopic mouse) are used, then the device can be operated with simple mechanical or optical mechanisms, but individuals with motion disabilities cannot use these devices effectively
Solution Approach 1:
The patent replaces mechanical input devices (mice, keyboards) with an eye tracking system that uses optical sensors to detect eye movements and blinking. This substitution eliminates the need for manual manipulation, enabling individuals with motion disabilities to control the device through natural eye movements alone.
Solution Approach 2:
The patent introduces an eye tracking camera and processing system as an intermediary between the user's intent and the device control. The system captures eye movement data, processes it to determine cursor movement commands, and executes the corresponding actions, serving as a bridge that translates physiological signals into control inputs.
2Adaptability or versatility
If eye movement tracking is implemented to enable control for disabled users, then accessibility is improved, but the device complexity and control precision requirements increase
Solution Approach 1:
The patent designs the eye tracking system to serve multiple functions: tracking cursor movement, detecting blinking for click actions, and providing feedback to the user. This multi-functional approach allows a single system to replace multiple input devices, enhancing adaptability while managing complexity through integration.
Solution Approach 2:
The patent implements feedback mechanisms where the system monitors eye movement data in real-time, processes it to determine user intent, and provides visual or other feedback to confirm recognition of the command. This closed-loop system enhances adaptability by allowing the system to adjust to individual user patterns while maintaining control precision.
3Ease of operation
If eye blinking is used to generate control commands, then the interface becomes more intuitive for disabled users, but the precision of detecting and measuring eye actions becomes more difficult
Solution Approach 1:
The patent utilizes the periodic nature of blinking by setting threshold criteria for detection, such as minimum blink duration or intensity. This approach converts the natural periodic action of blinking into discrete, detectable events that can be reliably distinguished from other eye movements, making the interface intuitive while maintaining detection accuracy.
Data Source
AI summary
A method of controlling a device is provided. The method includes receiving eye movement information of a user. A gazed position within a display area of the device is identified based on the eye movement information of the user. A position of a cursor corresponding to the gazed position is corrected based on the eye movement information. A control command corresponding to an area within the display area of the device is generated, based on the gazed position and the eye movement information. An operation of the device is controlled based on the control command.