Input Device Adaptive Load Threshold for Consistent Haptic Feedback
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Solution Overview
Problem
Conventional input devices face challenges in maintaining consistent operation feel due to load changes during input, and they often require complex configurations to account for varying contact areas and movement, leading to inconsistent user experiences.
Innovation Solution
The input device incorporates a pressure-sensitive sensor, an electrostatic capacitive touch sensor, and a controller that calculates pressure by dividing load by surface area, determines load states, and provides haptic feedback based on these calculations, allowing for adaptive vibration strength and operation values to maintain consistent input experiences across different contact conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pressure-sensitive controllers are used to detect load, then the device can detect pressing force, but the operation feel becomes inconsistent due to load changes during input
Solution Approach 1:
The patent applies dynamics by making the load threshold adaptive rather than fixed. The detection controller dynamically adjusts the load threshold based on the rate of change of detected load, allowing the system to respond appropriately to different input speeds while maintaining consistent operation feel. This resolves the contradiction by enabling the system to accommodate varying input conditions without compromising measurement precision or operational consistency.
Solution Approach 2:
The patent changes the parameter of load threshold from a static value to a dynamically adjusted value based on load change rate. By modifying this critical parameter adaptively, the system maintains accurate load detection while ensuring consistent operation feel across different input scenarios, thus resolving the technical contradiction between measurement precision and ease of operation.
2Measurement precision
If complex configurations are added to account for varying contact areas and movement, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent achieves multi-functionality by using a single integrated controller that performs both electrostatic capacitive touch sensing and pressure-sensitive load detection. This unified approach allows the system to detect both contact area and load information without requiring separate complex detection systems, thereby improving measurement precision while avoiding increased device complexity.
Solution Approach 2:
The patent merges the touch sensor and pressure sensor functions into a single integrated detection system controlled by one controller. By combining these detection capabilities, the system achieves comprehensive measurement of contact area and movement without the complexity of multiple independent systems, resolving the contradiction between measurement precision and device complexity.
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
This configuration ensures consistent operation feel by adjusting vibration strength and operation values based on contact area and load states, enhancing user experience and simplifying device configuration.
Implementation Method 1
a pressure-sensitive sensor that detects the load received by the input component
Implementation Method 2
an electrostatic capacitive touch sensor configured to detect a surface area of contact
Data Source
AI summary
A main body includes an input component that receives a load. A pressure-sensitive sensor detects the load received by the input component. A drive unit performs a predetermined operation. A drive controller activates the drive unit when the load detected by the pressure-sensitive sensor reaches a predetermined load threshold. A detection controller changes the predetermined load threshold in accordance with the rate of change in the load detected by the pressure-sensitive sensor.