Touch Device Force Feedback via Membrane Sensor
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Solution Overview
Problem
Existing touch devices lack a mechanism for providing pressure feedback to users, resulting in a poor user experience due to the absence of in-depth interaction between the user and the device.
Innovation Solution
A touch device equipped with a membrane pressure sensor and a force feedback structure, where the membrane pressure sensor generates a pressure signal based on the applied force, and the force feedback structure converts this signal into a corresponding feedback force transmitted to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a membrane pressure sensor and force feedback structure are added to the touch device, then pressure feedback capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the pressure sensing function and force feedback function into a single integrated module. The membrane pressure sensor and force feedback structure are positioned at the same location on the touch device, allowing bidirectional interaction (sensing and actuation) through a unified structural design, thereby reducing overall system complexity despite adding functionality.
Solution Approach 2:
The touch device structure is designed to serve multiple functions: the membrane and support structure both act as mechanical elements for pressure sensing and force feedback transmission. The same structural components participate in both detection and actuation processes, eliminating the need for separate dedicated structures for each function.
2Ease of manufacture
If pressure sensing elements and electrodes are integrated into the membrane structure, then manufacturing simplicity is improved, but measurement precision may worsen
Solution Approach 1:
The patent uses a flexible membrane structure with integrated electrodes and pressure sensing elements. The thin film membrane allows for simple integration of sensing components during manufacturing while maintaining sufficient mechanical properties for accurate pressure detection and feedback force transmission.
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 implementation of pressure feedback enhances user interaction by providing tactile feedback corresponding to the applied force, thereby improving the overall user experience while maintaining a simple and cost-effective structure.
Implementation Method 1
a variable resistance elastic body disposed on the lower electrode
Implementation Method 2
a force feedback structure arranged on the lower surface of the touch sensing layer and electrically connected to the membrane pressure sensor, configured to receive the pressure signal and generate a feedback force corresponding to the pressure signal
Data Source
AI summary
A touch device comprises a base, a membrane pressure sensor arranged on the base, a touch sensing layer covering the membrane pressure sensor, and a force feedback structure arranged on the lower surface of the touch sensing layer and electrically connected to the membrane pressure sensor. The membrane pressure sensor is configured to generate a pressing signal related to the force applied to it, and the force feedback structure is configured to receive the pressing signal and generate a feedback force corresponding to it.