Touch Input Device Erases Residual Strokes During Menu Access
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Solution Overview
Problem
In touch operation input devices, such as tablet terminals and electronic blackboards, the trace of a pen long press for menu activation remains on the screen, causing inconvenience as it must be manually erased, obscuring the menu and requiring user intervention.
Innovation Solution
A touch operation input device with a processor that determines a touch operation as a menu process based on duration and movement, erasing the drawn image when the touch is released, preventing residual images in drawing mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a menu is displayed by long pressing the pen in drawing mode, then the menu can be accessed and operated, but the stroke trace remains on the screen requiring manual erasure
Solution Approach 1:
The patent converts the harmful residual stroke trace into a beneficial feature by detecting its presence and automatically erasing it. The system uses the stroke trace as an indicator that a menu operation was performed, then automatically removes it to maintain screen cleanliness while preserving the intended drawing content.
Solution Approach 2:
The system performs self-service by automatically detecting and erasing its own residual stroke traces without requiring user intervention. The touch operation detector, operation processor, and image processor work together to autonomously identify menu-related strokes and remove them, making the interface maintenance automatic.
2Object-generated harmful factors
If the stroke trace is automatically erased, then the screen remains clean, but the drawing content may be accidentally removed
Solution Approach 1:
The patent applies local quality by differentiating between menu operation strokes and drawing strokes based on their specific characteristics. The system analyzes stroke attributes such as position, duration, and context to determine whether a stroke is menu-related or drawing-related, then applies erasure only to the appropriate local area (menu strokes) while preserving drawing content.
Solution Approach 2:
The system uses feedback mechanisms to verify whether a stroke should be erased before actually removing it. The operation processor analyzes the detected touch operation characteristics and provides feedback to the image processor about whether the stroke represents a menu operation or drawing content, ensuring accurate discrimination and preventing accidental loss of drawing content.
Data Source
AI summary
A touch operation input device that allows input by a touch operation to a display screen, has a touch operation detector for detecting a touch operation; an operation processor for performing a process by determining operated content based on a detection result of the touch operation detector; a menu processor for performing a menu displaying process and a process of a menu item, based on a determination result of the operation processor; an image processor for performing a process of generating a drawn image on a touched portion when in a drawing mode; and a display controller for performing control of display on a display screen. When the operation processor has determined the touch operation as an operation for a menu process, the image processor performs a process of erasing the drawn image drawn by the touch operation even in the drawing mode.