Image Processing Apparatus Hold-Down Detection on Pressure Sensitive Touch Displays
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Solution Overview
Problem
In image processing apparatuses with pressure sensitive touch displays, user operations that intend to hold down software keys are misinterpreted due to the entire finger pad being recognized as a touch position, leading to context menus not being displayed even when the user wishes to display them, as the movement distance exceeds the threshold for cancellation processing.
Innovation Solution
The image processing apparatus re-executes the determination for displaying a context menu without cancelling processing, even when a user operation on a software key satisfies the cancellation condition, by distinguishing between different types of touch operations and adjusting thresholds based on the type of touch display used, ensuring that hold-down operations are correctly identified and context menus are displayed accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the entire finger pad area is recognized as touch position on pressure sensitive touch display, then the touch detection area is improved, but the operation precision deteriorates causing misinterpretation of hold-down operations
Solution Approach 1:
The patent segments the touch detection process into two independent stages: first detecting the touch position (utilizing entire finger pad area), then determining operation type based on pressure magnitude. This segmentation allows the system to benefit from large touch detection area while maintaining operation identification precision through separate pressure-based classification.
Solution Approach 2:
The patent changes the detection parameter from position-only to position-plus-pressure. By incorporating pressure magnitude as an additional parameter, the system can distinguish between tap operations and hold-down operations even when the touch position spans the entire finger pad area, thus resolving the precision issue.
2Reliability
If movement distance threshold is set to prevent erroneous processing, then processing reliability is improved, but legitimate hold-down operations are cancelled causing functionality loss
Solution Approach 1:
The patent makes the operation determination dynamic by using pressure magnitude as a variable criterion. Instead of a fixed movement distance threshold, the system dynamically classifies operations based on real-time pressure data, allowing it to adapt to different operation types (tap vs. hold-down) while maintaining reliability.
Solution Approach 2:
The system uses pressure magnitude feedback to distinguish between different operation types. By continuously monitoring pressure levels during the touch event, the system can provide feedback to determine whether the operation is a tap or hold-down, preventing erroneous cancellation of legitimate operations.
3Adaptability or versatility
If context menu display is triggered by hold-down operation detection, then user interface functionality is improved, but false triggering from misinterpreted operations reduces interface reliability
Solution Approach 1:
The patent changes the triggering parameter for context menu display from movement distance to pressure magnitude. By using pressure levels as the criterion, the system can reliably distinguish between tap operations (no context menu) and hold-down operations (context menu displayed), eliminating false triggering while maintaining functionality.
Data Source
AI summary
An image processing apparatus that, in a case where processing corresponding to a user operation is determined to be cancelled before cancellation of the processing corresponding to the user operation, the user operation is determined to correspond to a hold-down operation, and a context menu is displayed in a case where the user operation corresponds to the hold-down operation.