Piezoelectric Haptic Actuator Integration in Display Substrates
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Solution Overview
Problem
Traditional user interfaces for electronic devices primarily engage visual and auditory senses, with limited physical feedback capabilities, and are often bulky, making them difficult to integrate into small form-factor devices.
Innovation Solution
Incorporation of piezoelectric haptic actuators into integrated haptic stacks, which share a substrate with other components or are placed on a dedicated haptic substrate, to generate tactile feedback by imparting physical force and momentum transfer, enhancing user interaction through varied tactile effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional haptic mechanisms are used, then tactile feedback is provided, but device size increases and integration becomes difficult
Solution Approach 1:
The patent combines the haptic actuator and display into a single integrated display assembly, where the haptic actuator is positioned behind the display and shares structural components. This merging eliminates the need for separate haptic mechanisms, reducing overall device volume while maintaining tactile feedback functionality.
Solution Approach 2:
The display assembly serves multiple functions simultaneously: visual display and haptic feedback. The integrated structure allows the same component to provide both image presentation and tactile response, eliminating dedicated single-function components and reducing device bulk.
2Ease of operation
If traditional haptic mechanisms are used, then tactile feedback is provided, but device complexity increases
Solution Approach 1:
The patent merges multiple components (display, haptic actuator, and supporting structures) into a single integrated assembly. This reduces the total parts count by eliminating interfaces and connections between separate haptic and display subsystems, thereby reducing device complexity.
3Volume of moving object
If piezoelectric haptic actuators are integrated into display assembly, then tactile feedback is enhanced and device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The haptic actuator and display are designed as a pre-integrated assembly with defined mechanical interfaces and mounting structures. This preliminary integration design establishes precise alignment features and tolerance specifications early in the design process, facilitating accurate manufacturing and assembly while maintaining compact dimensions.
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 experience by providing richer tactile feedback, reduces device bulk, minimizes parts count, and lowers production costs, while allowing for more interactive and satisfying user interactions with electronic devices.
Implementation Method 1
Piezoelectric haptic actuators are configured to generate a physical force and impart a transfer of momentum
Data Source
AI summary
User interface experiences with electronic devices are enhanced with feedback cues such as haptic or vibrotactile output feedback. One or more piezoelectric actuators generate haptic output. The one or more piezoelectric actuators may be integrated onto a display substrate, a battery case, a device enclosure, or other component. Such integration may improve propagation of the haptic output to the user, reduce bulk of the electronic device, minimize parts count, and reduce production costs.