Virtual Keyboard Haptic Feedback via Pressure Threshold
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Solution Overview
Problem
Virtual keyboards lack key position and key stroke feedback, making it difficult for users to accurately input content, as they cannot perceive the key position and stroke, leading to potential misoperations.
Innovation Solution
A touch device with a processor, touch panel, pressure sensitive module, and touch feedback module that detects touch operations and provides key position and key stroke feedback, ensuring accurate input by simulating physical keyboard feedback when the touch pressure exceeds a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a virtual keyboard is used on a touch screen, then the device structure is simplified and portability is improved, but the user cannot perceive key position and stroke, leading to misoperations
Solution Approach 1:
The patent applies feedback by providing tactile responses to users when they touch virtual keyboard keys. The touch feedback module generates haptic feedback that simulates physical key press sensations, allowing users to perceive key position and stroke without a physical keyboard structure. This resolves the contradiction by maintaining the simplified virtual keyboard structure while improving input accuracy through sensory feedback.
Solution Approach 2:
The patent introduces a touch feedback module as an intermediary between the touch screen and the user's finger. This intermediary component translates touch inputs into tactile feedback sensations, bridging the gap between the virtual keyboard interface and the user's need for physical key perception. The feedback module acts as a mediator that provides positional and stroke information without requiring a physical keyboard structure.
2Measurement precision
If pressure sensitivity is added to detect key stroke, then input accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent merges the touch detection function and pressure sensitivity detection into a single integrated touch screen system. The touch feedback module combines multiple detection capabilities (touch position, touch pressure, touch duration) into one unified component, avoiding the need for separate sensors and reducing overall device complexity while improving measurement precision for key stroke detection.
Solution Approach 2:
The touch screen is designed with multi-functionality, serving both as a visual display interface and as a pressure-sensitive input device. The same touch screen structure performs multiple functions: displaying virtual keys, detecting touch position, measuring touch pressure for stroke detection, and triggering feedback. This universal approach improves measurement precision without adding separate specialized components.
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 reduces misoperations by providing users with key position and key stroke feedback, allowing for accurate input on virtual keyboards by ensuring the touch operation meets the trigger condition and applies sufficient pressure, thereby enhancing the virtual keyboard input experience.
Implementation Method 1
a pressure sensitive module, and a touch feedback module electrically connected to the processor, where the touch panel is located above the pressure sensitive module
Data Source
AI summary
Methods and apparatuses are provided for inputting contents based on a virtual keyboard in the field of terminal input. The method includes: detecting a touch operation corresponding to the virtual keyboard; controlling a touch feedback module to send key position feedback information according to a relative position between a touch position of the touch operation and keys of the virtual keyboard; and when the touch operation meets the trigger condition of the target key and a touch pressure of the touch operation is greater than a pressure threshold value, inputting contents corresponding to the target key, and controlling the touch feedback module to send key stroke feedback information.