Piezo Speaker Actuating Display for Haptic and Acoustic Output
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Solution Overview
Problem
Portable devices, such as mobile phones, face issues with speaker distortion and reduced lifetime due to contaminants like iron particles affecting moving coil dynamic speakers, which require specific signal processing and can lead to acoustic frequency response issues and haptic feedback limitations.
Innovation Solution
A speaker design featuring a unibody case with a flexible gasket and piezo-electric transducers that actuate the display to generate acoustic waves and haptic feedback, with a gasket configuration that provides tuned acoustic and haptic performance by suspending the display relative to the case, allowing for localized tactile effects and improved frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a moving coil dynamic speaker configuration is used, then acoustic frequency response can be achieved, but the speaker size becomes large relative to device volume and requires specific signal processing
Solution Approach 1:
The patent replaces the traditional moving coil dynamic speaker configuration with a piezoelectric transducer system. The piezoelectric transducer converts electrical signals directly into mechanical vibrations of the display assembly, eliminating the need for a large moving coil mechanism while achieving acceptable acoustic output and frequency response.
Solution Approach 2:
The display assembly serves multiple functions: it acts as both the visual display surface and the acoustic radiating surface. The piezoelectric transducer coupled to the display assembly enables the display to function as both the information presentation interface and the speaker diaphragm, eliminating the need for a separate large speaker mechanism.
2Reliability
If a moving coil dynamic speaker is used, then acoustic output can be produced, but contaminants such as iron particles are attracted reducing device lifetime
Solution Approach 1:
The patent eliminates the electromagnetic motor structure of moving coil speakers that generates magnetic fields attracting iron particles. By using piezoelectric transducers coupled to the display assembly, the system produces acoustic output through direct piezoelectric vibration without requiring electromagnetic attraction mechanisms, thereby preventing contaminant accumulation.
3Stability of the object's composition
If the display is rigidly fixed to the case, then structural stability is improved, but haptic feedback and acoustic wave generation are limited
Solution Approach 1:
The patent introduces a flexible gasket between the display assembly and the case that allows controlled relative movement. This dynamic coupling enables the display to vibrate and move relative to the case for haptic feedback and acoustic wave generation, while the gasket maintains sufficient structural stability for normal operation and prevents excessive movement.
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 enhances acoustic output and haptic feedback performance, reduces contamination risks, and extends device lifetime by using a flexible gasket to suspend the display, providing a tuned frequency response and localized tactile effects.
Implementation Method 1
at least one piezo-electric transducer configured to actuate the display to move the display relative to the case to generate acoustic waves
Implementation Method 2
The suspension part may be a resilient folded surface, configured to suspend the display relative to the case by the bending force of the resilient folded surface
Data Source
AI summary
An apparatus is described, the apparatus including a case, a display assembly, a chassis connected to the display assembly, a suspension component between the display assembly and the case, wherein the suspension component is configured to allow the display assembly to move relative to the case, at least one vibrating element configured to actuate the chassis to move the display assembly relative to the case to generate at least one of acoustic waves or haptic/tactile effect, and an internal cavity below the display, wherein electronic components of the apparatus are located at the internal cavity.