Input Pad Touch Pressure Validation for Erroneous Signals
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Solution Overview
Problem
Existing input apparatuses with touch and pressure sensing capabilities often generate erroneous input signals due to unintended activation of the pressure sensing apparatus, leading to unintended input operations.
Innovation Solution
An input method and apparatus that utilize a touch sensing apparatus and a pressure sensing apparatus to validate or invalidate pressure sensing signals based on variations in touch sensing signals, determining whether an intended input operation is performed by analyzing the touch sensing signal immediately before the pressure sensing signal is received, thereby preventing erroneous input signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure sensing apparatus is added to the input pad, then the input pad can detect intended pressing operations, but erroneous input signals are generated when the input pad is pressed without intention
Solution Approach 1:
The system performs preliminary detection of touch sensing signals before the pressure sensing apparatus detects a pressing operation. By analyzing whether the finger is properly positioned on the sensing surface in advance, the system can prevent erroneous input signals from being generated when the input pad is accidentally pressed during coordinate input operations.
2Adaptability or versatility
If the input pad is used for coordinate input by touching and moving a finger, then the sensing surface can be used as a coordinate input area, but the detection switch may be switched on unintentionally
Solution Approach 1:
Before activating the detection switch in response to a pressing operation, the system performs preliminary validation by checking the touch sensing signal to confirm the finger is properly positioned on the sensing surface. This prevents unintentional activation of the detection switch during normal coordinate input operations.
Solution Approach 2:
The system uses feedback from the touch sensing apparatus to validate whether a pressing operation should be recognized. By continuously monitoring the touch sensing signal and comparing it with the pressure sensing signal, the system can determine whether the pressing was intentional and properly positioned, thereby preventing erroneous input signals.
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
Effectively differentiates between intended and unintended input operations, preventing erroneous input signals by analyzing touch sensing signal variations before validating pressure sensing signals, ensuring accurate input operations.
Implementation Method 1
a touch sensing apparatus for sensing a position of the sensing surface on which an operating object is touched
Implementation Method 2
a pressure sensing apparatus for sensing that the sensing surface is pressed
Data Source
AI summary
When it is sensed that a finger is touched to a movable pad and a detection switch is switched on, time that the finger is touched to the sensing surface (Condition (1)), distance in which the finger is moved on the sensing surface (Condition (2)), speed that the finger is moved on the sensing surface (Condition (3)), and acceleration obtained when the finger is moved on the sensing surface (Condition (4)) are referred thereto. When any one of the conditions is satisfied, it is determined to be a pressing operation which is not intended by an operator.