Piezoelectric Actuator Tactile Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing portable electronic devices lack effective methods for providing tactile feedback that is both discreet and informative, especially in scenarios where visual display is not feasible, such as during handheld use or when the device is worn on the wrist.
Innovation Solution
A method involving a portable electronic device with an actuator, such as a piezoelectric disk, that is actuated a discrete integer number of times based on detected inputs to provide tactile output, allowing users to receive information without needing to view the device's display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device size is reduced for portability, then ease of portability is improved, but the ability to provide effective tactile feedback is worsened
Solution Approach 1:
The patent segments the feedback mechanism into multiple discrete actuator activations rather than a single continuous action. The actuator is controlled to activate a specific number of times based on the notification type, allowing differentiated tactile feedback from a compact component.
Solution Approach 2:
The patent employs periodic activation of the actuator, where the motor activates in discrete cycles rather than continuously. By controlling the number of activation cycles, the system provides varied tactile feedback patterns (single tap, double tap, continuous vibration) from a small device component.
2Loss of information
If visual display is used to provide information, then information delivery is improved, but usability in handheld or wrist-worn scenarios is worsened
Solution Approach 1:
The patent substitutes the visual display system with a mechanical tactile feedback system. Instead of relying on optical information delivery through screens, the system uses mechanical actuator activation to convey notification information through tactile sensations that users can perceive while holding or wearing the device.
Solution Approach 2:
The actuator serves as an intermediary between the notification system and the user. It translates digital notification data into physical tactile sensations, providing an intermediate channel for information delivery that does not require visual engagement.
3Loss of information
If tactile feedback is provided continuously, then information delivery is improved, but energy consumption is worsened
Solution Approach 1:
The system uses periodic actuator activation with controlled duration and frequency. By activating the actuator only for the necessary number of cycles to convey the notification, energy is conserved while still delivering complete information. Different notification types receive different numbers of activation cycles.
Solution Approach 2:
The patent applies partial action by providing only the minimum necessary tactile feedback required to convey notification information. Rather than continuous activation, the actuator is activated for specific discrete periods sufficient to communicate the alert, reducing overall energy consumption.
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 method enables users to receive notifications and information through tactile feedback, enhancing usability in situations where visual access is difficult or impractical, while allowing for user control over the duration and intensity of the tactile output.
Implementation Method 1
A method involving a portable electronic device with an actuator, such as a piezoelectric disk, that is actuated a discrete integer number of times based on detected inputs to provide tactile output
Data Source
AI summary
A method of controlling an electronic device includes detecting receipt of an input, determining a response number in response to receipt of the input, and actuating an actuator of the electronic device a discrete integer number of times based on the response number.