Vibration Transfer Layer Mesh Pattern for Display Haptics
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Solution Overview
Problem
Existing touch sensitive elements in display devices have low vibration intensity and durability, and struggle to effectively transfer vibrations to users due to their opaque materials and direct contact with the display panel, which limits displacement and blocking force.
Innovation Solution
A display device design featuring a touch sensitive element with an electro active layer and a vibration transfer layer between the display panel and the touch sensitive element, where the vibration transfer layer has a mesh pattern with openings to allow for contraction and expansion, enhancing vibration intensity and blocking force by matching the resonant frequency with the applied voltage frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the touch sensitive element is disposed under the display panel, then the structure is compact and integrated, but the vibration intensity is reduced because vibrations cannot be sufficiently transferred to the user
Solution Approach 1:
A vibration transfer layer is introduced as an intermediary component between the touch sensitive element and the display panel. This layer has a mesh pattern structure that specifically facilitates vibration transmission while maintaining the integrated structure, thus resolving the contradiction between structural integration and vibration intensity.
Solution Approach 2:
The vibration transfer layer employs a mesh pattern with openings, creating a porous structure that allows vibrations to pass through effectively. This porous design enables the touch sensitive element to vibrate freely while transferring vibrations to the display panel, maintaining both structural integration and high vibration intensity.
2Adaptability or versatility
If the touch sensitive element is made thin and flexible using EAP, then it can be easily applied to various display devices, but the vibration intensity is lower and driving voltage is higher
Solution Approach 1:
The vibration transfer layer acts as a mediator that amplifies and transmits vibrations from the thin EAP-based touch sensitive element to the display panel, compensating for the low vibration intensity of the flexible EAP material while maintaining its adaptability.
Solution Approach 2:
The mesh pattern structure of the vibration transfer layer is designed to resonate with and amplify the vibrations generated by the EAP element, enhancing the vibration intensity through mechanical vibration principles while keeping the EAP element thin and flexible.
3Ease of operation
If the touch sensitive element is formed of opaque materials, then it can provide haptic effects, but vibrations cannot be effectively transferred to the user and the element has low durability
Solution Approach 1:
The mesh pattern with openings in the vibration transfer layer creates a porous structure that allows vibrations to pass through the opaque touch sensitive element effectively, improving both vibration transfer efficiency and durability by reducing stress concentration.
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 significantly improves vibration intensity and blocking force, allowing the touch sensitive element to effectively transfer vibrations to the display panel, enhancing user feedback and durability while maintaining visibility and reducing the risk of damage from external shocks.
Implementation Method 1
an electroactive layer configured to vibrate responsive to applying a voltage difference between the second electrode and at least one of the plurality of first electrodes
Implementation Method 2
a vibration transfer layer between the display panel and the touch sensitive element, the vibration transfer layer comprising a plurality of openings, and the vibration transfer layer configured to transmit the vibration generated by the touch sensitive element to the display panel
Implementation Method 3
The electro active layer of the touch sensitive element can contract and expand in a vertical direction within the plurality of openings of the vibration transfer layer. Thus, the blocking force of the touch sensitive element can be improved
Data Source
AI summary
Provided is a display device. The display device includes a display panel, a vibration transfer layer, and a touch sensitive element. The vibration transfer layer is disposed under the display panel and has a plurality of openings. The touch sensitive element is disposed under the vibration transfer layer.