Haptic Feedback System Reducing Response Delay
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Solution Overview
Problem
Conventional haptic feedback systems in mobile devices experience delays in responding to touch inputs due to the lag between force measurement and actuation, leading to inaccurate emulation of user interface responses and noticeable lag during quick interactions like typing.
Innovation Solution
A haptic feedback system that integrates a processor, touch sensor, and force sensor to simultaneously measure touch location and force, allowing for immediate configuration adjustments based on applications, user settings, or power modes, thereby reducing response delay by providing haptic effects proportional to the input force and location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force sensors are used to measure the force of a touch on a screen, then the haptic feedback system can provide tactile response, but the delay between measurement and actuation becomes too long to accurately emulate the response of an object
Solution Approach 1:
The system pre-loads and pre-processes haptic feedback configurations and parameters before they are actually needed during user interaction. This includes pre-calculating haptic effects for different touch scenarios and pre-configuring the haptic actuator parameters, so that when a touch occurs, the feedback can be delivered with minimal processing delay.
Solution Approach 2:
The haptic feedback system is divided into independent modular components: force sensing module, configuration management module, haptic effect processing module, and actuator control module. Each module operates semi-independently with defined interfaces, allowing parallel processing and reducing bottlenecks in the feedback loop.
2Adaptability or versatility
If conventional processors simultaneously measure location and force of user input, then both parameters can be captured, but the processor cannot provide custom haptic effects for that particular location or force level without lag
Solution Approach 1:
The system pre-loads and pre-processes haptic feedback configurations and parameters before they are actually needed during user interaction. This includes pre-calculating haptic effects for different touch scenarios and pre-configuring the haptic actuator parameters, so that when a touch occurs, the feedback can be delivered with minimal processing delay.
Solution Approach 2:
The system provides different haptic feedback configurations for different regions and contexts: location-specific haptic profiles for different areas of the screen, force-level-specific effects for different press depths, and application-specific configurations for different apps. Each location and force level has its own optimized haptic parameters pre-configured for immediate delivery.
3Adaptability or versatility
If the haptic feedback system provides detailed configuration settings for different applications and power modes, then the user interface experience can be optimized, but the system complexity increases
Solution Approach 1:
The configuration management system uses a universal hierarchical structure that can adapt to multiple applications and power modes through a single framework. The same configuration management module handles different apps, power levels, and touch scenarios by selecting from pre-defined profiles and parameters, rather than requiring separate systems for each case.
Solution Approach 2:
The haptic feedback configuration system is designed to be dynamic and adaptive, automatically adjusting parameters based on current context (application being run, power mode, touch characteristics) without requiring manual reconfiguration. The system dynamically selects from pre-loaded configurations and can interpolate between parameter sets to provide context-appropriate haptic feedback.
Data Source
AI summary
Methods and apparatuses for providing haptic feedback are disclosed. An apparatus may include one or more processors and a touch sensor coupled to the one or more processors for sensing a user input. The apparatus may also contain a haptic feedback system and a force sensor coupled to the haptic feedback system for measuring a force of the user input. The haptic feedback system may provide a haptic effect based at least in part upon the force of the user input and a configuration of the haptic feedback system, and the one or more processors may change the configuration of the haptic feedback system based upon an application being executed, or a user-selected configuration, or a power mode, or a combination of the aforementioned.