Gaze-Controlled Input Element Speed Adjustment
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Solution Overview
Problem
Conventional line-of-sight input methods struggle to determine positions quickly and precisely according to user intention, often resulting in operation errors due to slow movement speeds and the need for sustained gaze direction.
Innovation Solution
A line-of-sight input device that uses a detection system to track gaze and rotational movements, with a movement control mechanism that increases speed as the gaze is farther from the target and decreases speed as it approaches, allowing for rapid and accurate positioning of input elements on a display or sound image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cursor moves sequentially through input elements one by one, then the system is simple to operate, but the time required increases in proportion to the number of input elements
Solution Approach 1:
The patent applies dynamics by making the cursor movement speed variable rather than constant. The cursor accelerates when far from the target position and decelerates as it approaches, allowing rapid traversal across the screen while maintaining precision near the destination. This dynamic speed adjustment resolves the contradiction by enabling both fast overall movement and accurate positioning.
Solution Approach 2:
The patent changes the parameter of movement speed from a fixed value to a variable that depends on the distance to the target position. By continuously adjusting the speed parameter based on real-time positional feedback, the system achieves both rapid movement across large distances and precise stopping at target elements, eliminating the time penalty of sequential movement.
2Loss of time
If the cursor movement speed is accelerated to reduce time, then the time to reach the target decreases, but operation errors increase due to difficulty in precise positioning
Solution Approach 1:
The system dynamically adjusts cursor speed based on real-time distance to the target. When the cursor is far from the target, high speed reduces traversal time. As the cursor approaches the target, speed automatically decreases to enable precise positioning. This dynamic adjustment maintains both speed and accuracy throughout the movement process.
Solution Approach 2:
The patent implements feedback control by continuously monitoring the cursor's position relative to the target and adjusting the movement speed accordingly. The system receives feedback about the distance to the target and modifies the speed parameter in response, ensuring that the cursor arrives at the precise target location while minimizing total travel time.
3Speed
If the user must maintain line-of-sight for three seconds to accelerate screen scrolling, then the acceleration can be triggered, but the user must sustain this position during the scroll which increases operational difficulty
Solution Approach 1:
The patent applies preliminary action by having the user perform a simple, short-duration action (maintaining gaze for a brief period) to pre-trigger the acceleration mode. Once triggered, the system automatically maintains the accelerated state without requiring continued user effort, thereby reducing the operational burden while achieving high-speed scrolling.
Data Source
AI summary
A line-of-sight input device includes a detection means that detects a point of gaze or an eyeball rotational movement of the user, a movement control means that moves the input element; and an input determining means that determine an input of the input element near a predetermined position when a predetermined condition is satisfied; wherein the movement control means increases a movement speed of the input element as the point of gaze is farther from the predetermined position or a rotation angle of the eyeball rotational movement is larger, and makes the movement speed closer to zero as the point of gaze becomes nearer to the predetermined position or a rotation angle of the eyeball rotational movement becomes smaller.