Vibration Module with Dynamic Magnetic Pole Switching for Rapid Response
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Solution Overview
Problem
Conventional vibration motors in portable terminals have long response times, limiting their ability to provide effective haptic feedback during rapid and continuous key input operations on touch screens, and are inadequate for providing sufficient vibration power for alarm functions.
Innovation Solution
A vibration module with a magnetic moving part and solenoid coil, supported by elastic members, which generates electromagnetic forces to produce rapid reciprocation and impact, simulating a click feeling and providing sufficient vibration power for both haptic feedback and alarm functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional linear motors are used, then alarm function is sufficient, but haptic feedback function is limited due to low response velocity
Solution Approach 1:
The patent employs a magnetic moving part that can dynamically change its magnetic pole configuration between a first state (first magnetic pole and second magnetic pole) and a second state (third magnetic pole and fourth magnetic pole). This dynamic switching enables the motor to rapidly reverse direction, achieving high response velocity while maintaining sufficient vibration power for both alarm and haptic feedback functions.
Solution Approach 2:
The invention changes the magnetic field parameters by switching between different magnetic pole configurations. By altering the magnetic pole states from the first state to the second state and vice versa, the motor achieves rapid parameter changes that enable high-speed response while maintaining the necessary vibration power output.
2Reliability
If coin type, cylinder or bar type vibration motors are used, then incoming call notification function is provided, but response time is long
Solution Approach 1:
The patent replaces conventional mechanical vibration motors (coin type, cylinder type, or bar type) with an electromagnetic motor system comprising a magnetic moving part and solenoid coils. This substitution eliminates the mechanical inertia limitations of traditional motors, achieving significantly reduced response time while maintaining reliable notification function.
Solution Approach 2:
The magnetic moving part operates by periodic switching between magnetic pole states, creating rapid back-and-forth motion. This periodic action between the first magnetic pole/second magnetic pole state and the third magnetic pole/fourth magnetic pole state enables the motor to complete vibration cycles quickly, reducing response time while ensuring reliable notification delivery.
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
The vibration module achieves a short response time, enabling effective haptic feedback and sufficient vibration power for alarm functions, such as incoming call notifications, with rapid and continuous key input operations.
Implementation Method 1
a solenoid coil provided in the housing... generates electromagnetic forces to produce rapid reciprocation
Implementation Method 2
elastic members supported between the opposite ends of the magnetic moving part and inner walls of the housing
Implementation Method 3
generates electromagnetic forces to produce rapid reciprocation and impact, simulating a click feeling
Data Source
AI summary
Disclosed is a vibration module for a portable terminal that includes a housing, a magnetic moving part movable in a first direction within the housing; an elastic member supported between the opposite ends of the magnetic moving part and inner walls of the housing, and a solenoid coil provided in the housing. The vibration module is positioned at one end of the moving section by the magnetic force of the magnetic moving part and an object around the magnetic moving part, allowing the vibration module to provide a user with a feeling similar to a click feeling via the acceleration produced at a stopping instant. In addition, when vibrating, the vibration module generates sufficient vibration power through acceleration at the instant of changing moving direction at the ends of the moving section, to provide an alarm function, such as an incoming call notification.