Motorized Scroll Wheel With EPM Drive for Smooth High-Speed Scrolling
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Solution Overview
Problem
Existing scroll wheels in input devices require frequent manual interaction for scrolling, leading to a time-consuming and uncomfortable user experience, especially when navigating lengthy documents or webpages, and often result in a jerky scrolling motion.
Innovation Solution
A motorized scroll wheel with an electro-permanent magnet (EPM) motor that automatically advances the scroll position, allowing for smooth scrolling at varying speeds, including matching or exceeding user input speed, and stopping at document ends, featuring adjustable torque, ratchet intervals, and haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional manual scroll wheel is used, then the device structure remains simple, but the user must interact with the scroll wheel numerous times to navigate lengthy documents, resulting in time consumption and a jerky user experience
Solution Approach 1:
The patent replaces the purely mechanical manual scroll wheel with a motorized system. A motor is integrated into the scroll wheel assembly to provide automated rotation, eliminating the need for users to manually rotate the wheel multiple times. The motor receives control signals from the computing device to automatically advance the scroll position at higher speeds, directly resolving the contradiction between scrolling productivity and mechanical simplicity.
Solution Approach 2:
The motorized scroll wheel operates autonomously based on control signals from the computing device. Once activated, the system self-regulates the scrolling motion without requiring continuous manual intervention. The motor automatically adjusts rotation speed and stopping positions based on document length and user preferences, enabling the system to serve itself in maintaining optimal scrolling performance.
2Speed
If the scroll wheel rotates quickly to cover more ground, then scrolling speed increases, but the motion becomes jerky and uncomfortable for the user
Solution Approach 1:
The patent implements dynamic speed control in the motorized scroll wheel system. The motor speed is not fixed but is continuously adjusted based on real-time feedback from sensors that detect the current scroll position and velocity. This dynamic regulation allows the system to maintain high average scrolling speeds while ensuring smooth, comfortable motion by adapting the rotation speed to match user preferences and document characteristics.
Solution Approach 2:
The system incorporates feedback mechanisms where sensors monitor the scroll wheel's rotation and provide real-time data to the control system. This feedback loop enables the motor to automatically adjust its speed and acceleration profiles, preventing jerky motions while maintaining high scrolling efficiency. The feedback ensures that speed increases are smooth and controlled rather than abrupt.
3Ease of operation
If the scroll wheel is motorized to advance automatically, then manual interaction is reduced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the motor component directly into the existing scroll wheel assembly, combining multiple functions into a single integrated unit. The motor is positioned within the scroll wheel structure itself, sharing common mounting points and control circuits with the existing components. This merging approach reduces the number of separate parts that need to be manufactured and assembled, thereby easing manufacturing complexity while achieving automated scrolling functionality.
4Productivity
If the motor drives the scroll wheel at high speed to match or exceed user input speed, then scrolling efficiency improves, but the system requires more complex control mechanisms
Solution Approach 1:
The control mechanism in the patent is designed with multi-functionality to manage various scrolling scenarios with a single unified system. The same motor and control circuitry handle both high-speed automated scrolling and lower-speed manual assistance modes. The control system universally manages acceleration, deceleration, direction changes, and stopping at document ends, eliminating the need for separate control mechanisms for different scrolling speeds and reducing overall system complexity.
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
Enhances scrolling efficiency by reducing manual interaction, providing a smooth and customizable scrolling experience, and ensuring precise control over scrolling speed and position, thus improving user comfort and navigation speed.
Implementation Method 1
A motorized scroll wheel with an electro-permanent magnet (EPM) motor that automatically advances the scroll position
Data Source
AI summary
A peripheral device may include a body. The device may include a scroll wheel rotatably coupled with the body. The scroll wheel may include a ferromagnetic rotor. The rotor may be generally annular and may define an open interior. The rotor may define a first plurality of teeth arranged about a periphery of the open interior. The device may include a stator disposed within the open interior. The stator may define a second plurality of teeth that are alignable with the first plurality of teeth. The stator may include a plurality of electro-permanent magnets. Each of the electro-permanent magnets may be disposed within a conductive coil. The device may include a position sensor that is configured to detect an angular position of the rotor. The device may include control circuitry that controls delivery of current to the electro-permanent magnets of the stator to controls a speed of the scroll wheel.