Input Error Correction for Multi-Input Touch and Pen Apparatus
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Solution Overview
Problem
Input errors occur unintentionally in multi-input apparatuses that combine touch and pen inputs, particularly when a user's hand touches the screen during pen input, leading to unintended data entry in capacitive and EMR schemes.
Innovation Solution
A method and apparatus that detect and correct input errors by canceling activities associated with hand touch inputs when a pen input occurs before the hand touch input is released, using a timer to differentiate between intended and unintended touch inputs, and storing activity execution information for correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-input apparatus combines both touch input and pen input schemes, then the device provides versatile input capabilities and intuitive user interface, but unintended input errors occur when hand touches the screen during pen input
Solution Approach 1:
The patent segments the input detection into two independent schemes: capacitive touch detection and EMR pen detection. By separating the detection mechanisms and processing them independently, the system can identify and differentiate between hand touches and pen inputs, preventing unintended inputs from hand contact during pen usage.
Solution Approach 2:
The system implements feedback by continuously monitoring both capacitive and EMR input signals simultaneously. When a pen input is detected via EMR scheme, the system provides feedback to suppress or ignore concurrent capacitive touch signals that would otherwise be registered as unintended hand touches, thereby maintaining input accuracy.
2Ease of operation
If the capacitive scheme is used to detect touch input, then the system provides intuitive touch interface, but it cannot detect pen input with conductive tip due to small contact area
Solution Approach 1:
The patent merges two different input detection schemes - capacitive touch detection and EMR (ElectroMagnetic Resonance) pen detection - into a single multi-input apparatus. The EMR scheme uses loop coils to detect the oscillating magnetic field generated by the pen, enabling accurate pen input detection without relying on contact area, while the capacitive scheme continues to provide intuitive touch interface capability.
3Device complexity
If the EMR scheme is used for pen input detection, then the sensor substrate can be disposed at the rear of the display module, but the system may register unintended inputs when hand touches the screen
Solution Approach 1:
The patent implements dynamic input processing by continuously monitoring the state of both capacitive and EMR detection schemes. When a pen input is detected through the EMR scheme, the system dynamically adjusts its behavior to suppress or cancel concurrent capacitive touch signals, thereby preventing unintended inputs from hand contact while maintaining the simplified rear-mounted sensor substrate arrangement.
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 solution provides a stable pen input environment by automatically detecting and correcting unintended hand touch inputs, preventing errors and ensuring accurate data entry during pen-based operations in capacitive and EMR schemes.
Implementation Method 1
The EMR scheme may have the sensor substrate disposed at the rear of the display module, because this scheme disposes a plurality of coils on the substrate and identifies a position of the pen by detecting a change in electromagnetic field occurring by an access of the pen to the sensor substrate
Implementation Method 2
The capacitive scheme detects a touch point using capacitance coupling with an Alternating Current (AC) voltage applied thereto
Data Source
AI summary
Methods and apparatus are provided for correcting an input error in an input apparatus capable of touch inputs of a first touch input scheme and a second touch input scheme. Upon detecting a touch input of the first touch input scheme, an activity corresponding to the detected touch input is executed and activity execution information corresponding to the activity is stored. The activity executed in accordance with the touch input of the first touch input scheme is cancelled, when a touch input of the second touch input scheme occurs before the touch input of the first touch input scheme is released or before a preset timer expires. The first touch input scheme and the second touch input scheme are different schemes.