3-axis Trackball Sensor Assembly for Intuitive Control
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Solution Overview
Problem
Trackball devices often have complex button layouts that can be intimidating for novice users and are not intuitive, requiring users to memorize button functions, and they can be economically challenging to produce due to the need for multiple buttons to control various system aspects.
Innovation Solution
An input device featuring a ball with sensor assemblies located at or near the equator to detect both X-Y motion and spin, allowing for multiple control functions without additional buttons, with a controller determining the mode based on sensor readings to send appropriate control signals to a host system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple buttons are added to control various system aspects, then the functionality and control capabilities are improved, but the device complexity and button layout complexity increase
Solution Approach 1:
The ball is designed to perform multiple control functions through different motion types (X-Y motion for cursor movement, spin for scrolling, and combinations for other controls) rather than requiring separate buttons for each function. This multi-functionality approach reduces the number of buttons needed while maintaining comprehensive control capabilities.
Solution Approach 2:
The patent combines multiple control functions into a single ball mechanism, merging what would traditionally require multiple separate buttons into one integrated input device. The sensor assembly detects different motion patterns of the same ball to distinguish between various control intentions.
2Adaptability or versatility
If multiple buttons are used to provide comprehensive control, then the system control capability is improved, but the ease of operation deteriorates for novice users
Solution Approach 1:
Instead of requiring users to memorize button functions (traditional approach), the invention inverts the approach by using natural, intuitive ball motions (pushing, rotating, twisting) that users can understand immediately without memorization. The control mapping is inverted from abstract button assignments to concrete physical motions.
Solution Approach 2:
The ball mechanism provides self-explanatory control through its physical design - the direction and type of motion naturally indicate the intended function, eliminating the need for users to learn or memorize button assignments. The interface is self-describing through its mechanical actions.
3Adaptability or versatility
If a large button layout is implemented, then the control coverage is improved, but the manufacturing cost and production complexity increase
Solution Approach 1:
The invention extracts the essential control function from multiple separate buttons and consolidates it into a single ball mechanism. By taking out only the necessary control capability and implementing it through the ball's multi-functional motions, the design reduces component count and simplifies manufacturing while maintaining full control coverage.
Data Source
AI summary
An input device is disclosed. The input device can provide a control signal to a host system. The input device can include a ball and one or more sensor assemblies configured to sense the position of the ball. The input device can sense movement both in the X-Y motion of the ball, and the spin of the ball. Different control signals may be sent to a host system based upon the X-Y motion and the spin of the ball.