Flexible Display Tactile Feedback via Segmented Press Structures
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Solution Overview
Problem
Conventional display devices lack the ability to provide tactile feedback specifically to touch input areas, failing to deliver a pressing tactile sensation in non-folding regions and often applying tactile feedback to the entire display area regardless of touch input locations.
Innovation Solution
A display device design featuring a support substrate with press structures in non-folding areas and an electroactive actuator under the display panel, allowing for tactile feedback to be transferred through a pressing sensation to each touch input area, utilizing a flexible display panel and a touch panel to sense user input and generate vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tactile feedback is applied to the entire display area, then all areas receive feedback, but the feedback cannot be precisely targeted to specific touch input areas
Solution Approach 1:
The support substrate is divided into multiple discrete press structures, each corresponding to a specific touch input area. When a user touches a particular area, only the corresponding press structure activates to provide tactile feedback, enabling precise localization of feedback while maintaining relatively simple individual component designs.
Solution Approach 2:
Different regions of the display device have different structural characteristics: the folding area uses a support substrate with openings for flexibility, while the non-folding areas use press structures for tactile feedback. This local differentiation allows each region to have optimized properties for its specific function.
2Force
If a rigid support structure is used to provide pressing sensation, then tactile feedback is strong, but the display panel cannot be folded
Solution Approach 1:
The support structure is designed with spatially varying properties: the folding area contains only openings to maintain flexibility and enable folding, while the non-folding areas contain press structures that provide strong tactile feedback. This local differentiation resolves the contradiction between rigidity for feedback and flexibility for folding.
Solution Approach 2:
The support substrate is segmented into distinct functional zones: opening regions for folding and press structure regions for tactile feedback. This segmentation allows the device to simultaneously achieve folding capability and strong localized tactile feedback without compromising either function.
3Ease of operation
If press structures are added to provide tactile feedback, then user interaction is enhanced, but the device structure becomes more complex
Solution Approach 1:
The press structures are integrated directly into the support substrate, combining the support function and tactile feedback function into a single component. This merging reduces the need for separate feedback mechanisms and simplifies the overall device structure while still providing enhanced user interaction.
Solution Approach 2:
The press structures are distributed as discrete elements within the support substrate, allowing the feedback function to be added without requiring a complete restructuring of the support system. This segmented integration maintains relative structural simplicity while enhancing user interaction.
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
Enables precise tactile feedback to specific touch input areas, enhancing user interaction by simulating a pressing sensation, and allowing the flexible display panel to be used in non-folding areas, improving user experience and interaction accuracy.
Implementation Method 1
an electroactive actuator under the display panel, allowing for tactile feedback to be transferred through a pressing sensation to each touch input area
Data Source
AI summary
Provided is a display device. The display device includes a display panel including a folding area and non-folding areas on both sides of the folding area. The display device also includes a support substrate disposed under the display panel. The support substrate includes a plurality of openings disposed in the folding area, and a plurality of press structures disposed in the non-folding areas. Therefore, it is possible to implement a display device that provides a tactile feedback for each touch input area.