Piezo Actuator Display Pivoting for Haptic Feedback
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Solution Overview
Problem
Portable electronic devices with touch-sensitive displays face challenges in minimizing size while maintaining effective user interaction and feedback, especially as devices become smaller and space for input and output is limited.
Innovation Solution
Incorporating piezo actuators between the base and touch-sensitive display, controlled by a controller to alternately actuate and apply forces, allowing the display to pivot relative to the base, enabling tactile feedback and vibration without the need for separate vibration motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device size is decreased to improve portability, then the device becomes more portable, but the space for user input and output is limited
Solution Approach 1:
The patent combines the vibration motor function with the display assembly by integrating piezoelectric actuators directly into the display structure. This merging eliminates the need for a separate vibration motor, freeing up space within the device while maintaining both display and tactile feedback functions.
Solution Approach 2:
The piezoelectric actuators serve multiple functions: they provide tactile feedback for touch input, generate vibration for haptic feedback, and enable the display to pivot relative to the base. This multi-functionality allows the device to maintain comprehensive user interaction capabilities in a compact form factor.
2Ease of operation
If separate vibration motors are added to provide tactile feedback, then user interaction is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent integrates the vibration generation function directly into the display assembly by incorporating piezoelectric actuators within the display structure. This eliminates the need for a separate vibration motor component, reducing overall device complexity while maintaining tactile feedback capability.
Solution Approach 2:
The display assembly serves itself by generating its own vibration and tactile feedback through the piezoelectric actuators. This self-service approach eliminates the need for external vibration motors, simplifying the device architecture while providing the required haptic feedback function.
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
This solution enhances user interaction by providing tactile feedback and vibration, improving usability on smaller devices while reducing noise and complexity, thus addressing the need for efficient space utilization and effective user input in portable electronic devices.
Implementation Method 1
piezo actuators disposed between the base and the touch-sensitive display, the piezo actuators including a first piezo actuator and a second piezo actuator spaced from the first piezo actuator
Implementation Method 2
a controller configured to control the piezo actuators to alternately actuate the first piezo actuator and the second piezo actuator and apply forces to the touch-sensitive display
Data Source
AI summary
An electronic device includes a base, a touch-sensitive display moveable relative to the base, piezo actuators disposed between the base and the touch-sensitive display, the piezo actuators including a first piezo actuator and a second piezo actuator spaced from the first piezo actuator, and a controller configured to control the piezo actuators to alternately actuate the first piezo actuator and the second piezo actuator and apply forces to the touch-sensitive display, thereby causing the touch-sensitive display to pivot relative to the base.