Dual Vibration Motors for Uniform Haptics on Flexible Displays
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Solution Overview
Problem
Existing electronic devices with flexible displays face challenges in providing consistent haptic notifications across varying display areas due to changes in housing configurations, as vibration intensity varies with housing movement.
Innovation Solution
The electronic device incorporates two vibration motors, one in each housing, controlled by a processor to adjust vibration intensity based on the distance of a touch input from each motor, ensuring consistent haptic feedback across the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single vibration motor is used in a flexible display device, then the device structure is simple, but the vibration intensity varies significantly across different display areas when the housing moves
Solution Approach 1:
The device divides the vibration generation function into multiple independent vibration motors (first vibration motor in first housing, second vibration motor in second housing). Each motor serves a specific housing and displays area, allowing independent control to achieve uniform vibration distribution across the entire flexible display when housings move relative to each other.
Solution Approach 2:
The system dynamically adjusts which vibration motor(s) operate based on the relative position of the first and second housings. When housings move, the processor activates the appropriate motor to maintain consistent vibration intensity at the contact point, making the vibration system adaptive to structural changes.
2Adaptability or versatility
If the display area is expanded using movable housings, then the flexible display functionality is improved, but the vibration intensity becomes inconsistent across the display area
Solution Approach 1:
Different parts of the system (first housing and second housing) are equipped with different vibration motors having potentially different characteristics. Each motor is optimized for its local housing and display region, allowing the system to maintain consistent haptic quality across varying display areas while preserving local optimization.
Solution Approach 2:
The processor continuously monitors the relative position of the housings and adjusts the operation of vibration motors accordingly. This feedback mechanism ensures that regardless of housing movement and display area changes, the vibration intensity at the user's touch contact point remains consistent.
3Manufacturing precision
If vibration motors are placed in both housings, then uniform vibration can be achieved across the display area, but the device complexity increases
Solution Approach 1:
Both the first and second vibration motors are designed to perform the same haptic notification function in their respective housings. This universality allows the system to maintain consistent vibration characteristics across different configurations while using standardized motor designs, partially offsetting the complexity increase.
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 solution provides a uniform haptic experience by dynamically adjusting vibration intensity based on the location of the touch input, maintaining consistency as the display area expands or contracts.
Implementation Method 1
The electronic device may include a vibration motor for providing the haptic notification
Data Source
AI summary
An electronic device includes: a first housing; a second housing movably coupled with respect to the first housing; a flexible display; a first vibration motor in the first housing; a second vibration motor in the second housing; and at least one processor. The at least one processor: receives a touch input through a display region of the flexible display; in response to the touch input, identifies a first distance between the position of a contact point of the touch input and the first vibration motor, and a second distance between the position and the second vibration motor; and adjusts, on the basis of the first distance and the second distance, the strength of vibration provided through the first vibration motor and the second vibration motor so as to provide a haptic notification.