Dual Eccentric Weight Vibration Motors for Power and Response Trade-offs
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Solution Overview
Problem
Existing vibration motors in electronic devices, such as smartphones and game machines, face challenges in generating appropriate vibrations for different situations without excessive power consumption, as large eccentric weights are required for strong vibrations but compromise response performance and increase power consumption.
Innovation Solution
A vibration generation device comprising two motors with different weights and time constants, where a heavier motor with a larger eccentric weight generates strong vibrations for notifications and a lighter motor with a smaller eccentric weight provides quick response vibrations for operation confirmations, allowing for distinct vibration types without excessive power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a large eccentric weight is provided to the vibration motor to generate strong vibration for notifications, then the vibration strength is improved, but the response performance deteriorates and power consumption increases
Solution Approach 1:
The vibration notification system is segmented into two distinct vibration motors: a first vibration motor with a large eccentric weight for strong vibrations (notifications), and a second vibration motor with a small eccentric weight for quick response vibrations (operation confirmations). This segmentation allows each motor to be optimized for its specific function, resolving the contradiction between vibration strength and response performance.
Solution Approach 2:
The system dynamically selects which vibration motor to activate based on the type of notification required. The vibration control unit determines whether to use the first vibration motor (strong vibration) or the second vibration motor (quick response) depending on the situation, allowing the system to adapt its vibration characteristics to match the specific notification needs.
2Force
If a large eccentric weight is provided to the vibration motor to generate strong vibration for notifications, then the vibration strength is improved, but the power consumption increases
Solution Approach 1:
The vibration notification system is segmented into two distinct vibration motors: a first vibration motor with a large eccentric weight for strong vibrations (notifications), and a second vibration motor with a small eccentric weight for quick response vibrations (operation confirmations). This segmentation allows each motor to be optimized for its specific function, resolving the contradiction between vibration strength and response performance.
Solution Approach 2:
The system changes the operational parameters by selecting different vibration motors based on the notification type. For operation confirmations where quick response is needed, the second vibration motor with smaller eccentric weight is used, reducing power consumption compared to continuously using the first vibration motor with large eccentric weight for all notifications.
3Speed
If the response performance of the vibration motor is improved, then the response speed is improved, but the power consumption becomes excessively high
Solution Approach 1:
The system changes the operational parameters by selecting different vibration motors based on the notification type. For operation confirmations where quick response is needed, the second vibration motor with smaller eccentric weight is used, reducing power consumption compared to continuously using the first vibration motor with large eccentric weight for all notifications.
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
Enables the generation of appropriate vibrations for various situations while minimizing power consumption by utilizing a heavier motor for notifications and a lighter motor for operation confirmations, improving response performance and reducing power usage.
Implementation Method 1
a first vibration motor provided with a first weight and adapted to one of rotate or reciprocate the first weight to generate vibration
Implementation Method 2
a second vibration motor having smaller time constant than the first vibration motor provided with a second weight and adapted to one of rotate or reciprocate the second weight to generate vibration
Data Source
AI summary
An electronic apparatus is configured to generate a variety of vibrations corresponding to a variety of different situations without excessively high power consumption. The electronic apparatus has first and second vibration motors having respective eccentric weights different in weight from each other for generating different first and second vibrations. An input/output section enables a user to select from a list of events stored in a storage section first events and second events. A controller drives the first vibration motor having a heavier weight with a strong vibration upon occurrence of the user-selected first events and drives the second vibration motor having a lighter weight with a weak vibration upon occurrence of the user-selected second events. The first events include an incoming phone call or email, a present alarm time, and a dynamic or important action, motion, and so on in a computer game. The second events include confirming input operations by the user, and a minute action, motion, and so on occurring in a computer game. The correspondence between the vibration motors and the events is selectable by the user.