Electrostrictive Haptics Deformer for Narrow Bezel Displays
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Solution Overview
Problem
Current haptics technologies, such as those using piezoelectric vibrators on bezels, limit effective touch interaction and are difficult to implement in narrow bezel designs, resulting in a poor user experience and limited tactile feedback.
Innovation Solution
A haptics structure comprising a base substrate with a platelike deformer made of transparent electrodes and an electrostrictive material layer, which deforms under voltage, and a strain gauge to measure deformation, allowing for improved tactile feedback and integration into display areas, enabling broader vibration coverage and a narrower bezel design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If piezoelectric vibrators are used on bezels for haptics feedback, then vibration feedback can be provided, but the effective touch interaction is limited and narrow bezel designs cannot be implemented
Solution Approach 1:
The patent divides the haptics function from the traditional bezel location and segments it into multiple independent deformer units that can be distributed across the display area. Each deformer includes transparent electrodes and electrostrictive material layers that can be independently controlled to provide localized vibration feedback, enabling both narrow bezels and effective touch interaction across the display surface.
Solution Approach 2:
The patent transitions the haptics structure from a one-dimensional bezel arrangement to a two-dimensional distribution across the display area. By integrating deformers within the display region and using transparent materials, the system provides vibration feedback across multiple spatial dimensions without increasing the physical bezel area, thus resolving the contradiction between interaction effectiveness and bezel size.
2Illumination intensity
If transparent electrodes and electrostrictive material layers are used in the deformer, then light transmittance is maintained, but the structural complexity increases
Solution Approach 1:
The patent employs transparent electrodes and electrostrictive material layers that serve multiple functions simultaneously: they provide the necessary electrical conductivity for actuation, maintain optical transparency for display visibility, and enable the deformation mechanism for haptics feedback. This multi-functionality reduces the need for separate components, thereby managing structural complexity while preserving light transmittance.
3Area of stationary object
If the haptics structure is integrated into the display area, then vibration coverage is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the haptics structure with the display panel fabrication process by integrating transparent electrodes and electrostrictive material layers into the existing display manufacturing workflow. This consolidation allows the haptics components to be produced simultaneously with display elements, expanding vibration coverage across the display area while avoiding the need for separate, complex manufacturing steps.
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
Enhances touch interaction experience by effectively driving various display regions to vibrate, providing realistic tactile feedback and allowing for a narrower bezel design without significantly affecting light transmittance.
Implementation Method 1
an electrostrictive material layer between the first transparent electrode and the second transparent electrode, where the electrostrictive material layer is deformed when a voltage is applied between the first transparent electrode and the second transparent electrode
Implementation Method 2
a strain gauge structure located on a side of the deformer away from the base substrate, configured to measure a deformation amount of the deformer
Data Source
AI summary
This application provides a haptics structure and a method for fabricating the same, a touch display panel and a touch display device. The haptics structure includes: a base substrate; a platelike deformer on the base substrate; and a strain gauge structure. The deformer includes a first transparent electrode, a second transparent electrode and an electrostrictive material layer between the first transparent electrode and the second transparent electrode, and the electrostrictive material layer is deformed when a voltage is applied between the first transparent electrode and the second transparent electrode. The strain gauge structure is located on a side of the deformer away from the base substrate, and is configured to measure a deformation amount of the deformer.