Interactive Display Stack With Vertically Aligned Haptic Transducers
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Solution Overview
Problem
Existing interactive image display devices combining light emission and electromechanical transduction functions face challenges in integrating these components efficiently, leading to suboptimal performance and manufacturing complexities.
Innovation Solution
An optoelectronic device is designed with electromechanical transducers and light-emitting diodes connected to a common transfer substrate, allowing for vertical alignment and a specific array configuration with a planarization layer and transparent protection cover, along with a conductive interconnection network for control, using materials like lead zirconate titanate or aluminum nitride for transducers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electromechanical transducers and light-emitting diodes are integrated in a same-plane arrangement, then device complexity is reduced, but haptic feedback intensity deteriorates due to insufficient mechanical coupling
Solution Approach 1:
The patent transitions from a same-plane arrangement to a vertical stacked arrangement, moving elements from two dimensions to three dimensions. The electromechanical transducer and light-emitting diode are positioned at different vertical levels with mechanical coupling through pillars, achieving both simplified integration and enhanced haptic feedback through direct vertical contact.
2Ease of manufacture
If transducers and LEDs are arranged with different pitches, then manufacturing flexibility is improved, but alignment precision deteriorates
Solution Approach 1:
The patent introduces conductive tracks and pillars as intermediary elements between the electromechanical transducer and light-emitting diode. These intermediaries provide mechanical support and electrical connection, enabling different pitch arrangements while maintaining precise vertical alignment through the mediating structures that bridge the two components.
3Reliability
If a transparent protection cover is added to protect LEDs, then device reliability is improved, but light emission intensity deteriorates due to potential light absorption or scattering
Solution Approach 1:
The patent employs a transparent protection cover made from thin film material that provides mechanical protection to the LEDs while minimizing light interference. The thin film structure allows light to pass through with minimal absorption or scattering, maintaining high light emission intensity while ensuring device reliability through protective coverage.
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 configuration enhances the integration and control of light emission and electromechanical transduction functions, enabling efficient manufacturing of large-scale interactive displays with improved haptic feedback and image display capabilities.
Implementation Method 1
each light-emitting diode comprises a single elementary diode adapted to emitting light in a wavelength range
Implementation Method 2
said at least one electromechanical transducer is a piezoelectric transducer
Implementation Method 3
said at least one electromechanical transducer is a PMUT or CMUT transducer
Data Source
AI summary
An optoelectronic device including at least one electromechanical transducer located vertically in line with at least one light-emitting diode, said at least one electromechanical transducer and said at least one light-emitting diode being connected to conductive tracks of a same transfer substrate.