Fluid-Filled Touch Panel Electrode for Uniform Haptic Damping
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Solution Overview
Problem
Existing touch panel display units with haptic feedback systems lack uniform damping across the touch surface, leading to inconsistent haptic feedback and potential mechanical oscillations.
Innovation Solution
A touch panel display unit with a deformable electrode filled with pressurized fluid, which detects displacement and provides damping through a capacitive coupling mechanism between the deformable and sensing electrodes, ensuring uniform haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional dampening components are used to provide restoring force, then haptic feedback is provided, but the damping is not uniform across the touch surface
Solution Approach 1:
The patent replaces traditional mechanical dampening components with an electrostatic damping system using electrode assemblies. The electrostatic force field provides uniform damping across the entire touch surface area, eliminating the non-uniform damping characteristics of mechanical components while maintaining reliable haptic feedback operation.
Solution Approach 2:
The patent changes the physical state and distribution of the damping mechanism by using a pressurized fluid-filled deformable electrode that can change its shape and contact area. This allows the damping force to be distributed uniformly across the touch surface, transforming the localized mechanical damping into a distributed electrostatic damping field.
2Force
If mechanical dampening components are used, then restoring force is provided, but mechanical oscillations occur
Solution Approach 1:
The patent substitutes mechanical dampening components with an electrostatic damping system that provides restoring force through electrostatic attraction between electrode assemblies. This eliminates mechanical contact and associated oscillations while maintaining the necessary restoring force for haptic feedback, achieving stable operation without mechanical vibrations.
3Reliability
If uniform damping is achieved across the touch surface, then consistent haptic feedback is provided, but the device complexity increases
Solution Approach 1:
The patent designs the electrode assembly to perform multiple functions simultaneously: it serves as both the dampening mechanism and the sensing element for detecting touch input. The same electrode structure provides both the electrostatic damping force and the capacitive sensing function, reducing overall device complexity despite achieving uniform damping across the touch surface.
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 ensures uniform damping and consistent haptic feedback, reducing mechanical oscillations and enhancing user interaction experience.
Implementation Method 1
a cavity filled with a pressurized fluid
Implementation Method 2
provide dampening in response to a displacement of the touch surface. The electrode assembly includes a deformable electrode defining a cavity filled with a pressurized fluid
Data Source
AI summary
A touch panel display unit that includes a front housing and an electrode assembly. The front housing includes a touch surface configured to be displaced in response to a force acting on the touch surface. The electrode assembly is configured to detect displacement of the touch surface and provide dampening in response to a displacement of the touch surface. The electrode assembly includes a deformable electrode defining a cavity filled with a pressurized fluid.