Touch Sensor Drag Cancellation via Dynamic Load Adjustment
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Solution Overview
Problem
In electronic devices with touch panels, the drag operation is prone to unintended termination due to changes in pressure vector during sliding, leading to objects being dropped at unintended positions, as the start and end of the drag operation are determined by pressure load detection, which can result in errors.
Innovation Solution
The device incorporates a control unit that sets different standard loads for entering and canceling the input receiving state based on touch object sliding detection and sliding speed, adjusting the canceling standard load to prevent unintended cancellation of the input receiving state during drag operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the input apparatus uses pressure load detection to determine the start and end of drag operation, then the drag operation can be controlled, but the drag operation is prone to unintended termination due to changes in pressure vector during sliding
Solution Approach 1:
The patent applies dynamics by making the canceling standard load dynamic rather than fixed. The control unit adjusts the canceling standard load based on whether sliding is detected: using a first standard load when sliding is detected and a second standard load when sliding is not detected. This dynamic adjustment allows the system to adapt to changing pressure conditions during drag operations, preventing unintended termination while maintaining reliable control.
Solution Approach 2:
The patent changes the parameter of canceling standard load based on sliding detection state. By switching between two different standard load values (first standard load during sliding, second standard load when not sliding), the system compensates for pressure vector changes during sliding, ensuring accurate determination of drag operation start and end points without unintended termination.
2Object-affected harmful factors
If the canceling standard load is set to detect light touches, then erroneous operations can be prevented, but legitimate drag operations may be interrupted when pressure decreases during sliding
Solution Approach 1:
The system dynamically adjusts the canceling standard load based on sliding detection. When sliding is detected during a drag operation, the first standard load is used which allows for pressure decrease during sliding without interrupting the operation. When sliding is not detected, the second standard load applies for normal touch operations. This dynamic behavior prevents erroneous operations while maintaining drag operation continuity.
Solution Approach 2:
The control unit continuously monitors sliding detection and provides feedback by adjusting the canceling standard load accordingly. This feedback mechanism ensures that when sliding is detected, the system switches to a more permissive standard load threshold, preventing unintended termination of drag operations while still maintaining erroneous operation prevention when sliding is not detected.
Data Source
AI summary
An electronic device for receiving an input based on a pressure load that reduces a risk of ending a drag operation despite a user's intention is provided.The electronic device includes a touch sensor configured to detect a touch by a touch object, a load detection unit configured to detect a pressure load on a touch face of the touch sensor, and a control unit configured to enter or cancel an input receiving state for receiving an input based on the pressure load detected by the load detection unit. The control unit, in the input receiving state, controls to make a standard load for canceling the input receiving state when a slide of the touch object touching the touch face is detected and a standard load for canceling the input receiving state when the slide of the touch object touching the touch face is not detected different from each other.