Touch Input Device 3D Image Rotation via Pressure Thresholds
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Solution Overview
Problem
Existing touch input devices require complex input operations to rotate 3D images, making them inconvenient for users.
Innovation Solution
A touch input device with a position sensor, pressure sensor, and controller that allows for simple and intuitive image rotation by detecting touch position movement and pressing force, enabling rotation based on predetermined thresholds and movement speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the user drags a 3D image while simultaneously pushing mouse keys to rotate the image, then the 3D image can be rotated to view freely selected portions, but the input operation becomes complex and inconvenient
Solution Approach 1:
The patent segments the rotation operation into distinct pressure-based modes: light pressure (≤ first threshold) enables dragging without rotation, while heavy pressure (> first threshold) enables rotation. This segmentation eliminates the need for simultaneous key presses, simplifying the user input while maintaining full rotational capability.
Solution Approach 2:
The patent changes the operational parameter from simultaneous multi-input (drag + key press) to pressure-variable single input. By detecting pressure magnitude as the distinguishing parameter, the system automatically switches between dragging mode and rotation mode, reducing operational complexity while preserving adaptability.
2Reliability
If the pressing force threshold is set high to prevent accidental rotation, then false rotations are reduced, but legitimate rotation inputs may be missed
Solution Approach 1:
The patent applies partial action by using two distinct pressure thresholds: the first threshold distinguishes dragging from rotation, while the second threshold (higher than the first) provides an additional safety margin to prevent accidental rotation. This layered threshold approach ensures both reliability and accessibility.
Solution Approach 2:
The system provides feedback through distinct visual indicators for dragging mode and rotation mode based on detected pressure levels. This feedback mechanism helps users understand when they are in rotation mode versus dragging mode, reducing accidental rotations while maintaining ease of intentional rotation.
Data Source
AI summary
A display device includes a housing, an operation surface, a position sensor, a press sensor, and a display unit. The position sensor detects a touched position on the operation surface. The press sensor detects a press on the operation surface. The display unit displays an image. When the press sensor detects a pressing amount not smaller than a first threshold, a control unit sets, as a rotation axis of a three-dimensional image, a direction orthogonal to the sliding direction of the touched position detected in the position sensor. The control unit then rotates the three-dimensional image in accordance with the sliding direction of the touched position detected in the position sensor.