Pen Position Switching Between Tablet Input and VR Coordinates
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Solution Overview
Problem
Existing methods for switching between touch sensor and non-contact detection in electronic pens require device inclination changes or suffer from decreased temporal resolution.
Innovation Solution
A spatial position indication system that includes an indicated position detecting circuit for contact input and a spatial position detecting circuit for hover regions, with a selecting circuit that switches between them based on the electronic pen's separation distance from the input surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If switching between touch sensor and non-contact detection is performed using motion sensor signals, then mode switching is enabled, but device inclination changes are required
Solution Approach 1:
The system changes the switching criterion from motion sensor signals (which require device inclination changes) to separation distance parameters (distance between electronic pen and input surface). This parameter change enables mode switching based on pen position rather than device orientation, eliminating the need for inclination changes while maintaining versatility
2Adaptability or versatility
If switching between touch sensor and non-contact detecting means is performed on a time-division basis, then both detection methods can be used, but temporal resolution of each is decreased
Solution Approach 1:
The system dynamically switches between touch sensor and non-contact detecting means based on real-time separation distance measurements. Instead of time-division multiplexing, the system uses spatial division with continuous monitoring, allowing the appropriate detection method to be actively selected based on pen position, thereby maintaining high temporal resolution while supporting both detection modes
Solution Approach 2:
The separation distance measurement acts as an intermediary parameter that mediates the selection between touch sensor and non-contact detecting means. This intermediary enables smooth transitions between detection modes based on physical proximity, avoiding the temporal resolution degradation associated with time-division switching
3Device complexity
If separate processes are used for two-dimensional drawing and three-dimensional representation, then processing is simplified, but operational integration is reduced
Solution Approach 1:
The system creates a unified input interface that handles both two-dimensional drawing and three-dimensional representation through a single integrated process. The touch sensor and non-contact detecting means share a common coordinate system and processing pipeline, enabling the same hardware to seamlessly perform multiple functions (2D drawing, 3D modeling, gesture recognition) without requiring separate processing architectures
Data Source
AI summary
Disclosed is a coordinate calculation system including a tablet, a tracking device, and a computer. The tablet detects a position of a pen tip of an electronic pen. The tracking is device positioned above the tablet and detects a position of a tracker of the electronic pen for inputting a position in a virtual reality (VR) space. In a first mode, the computer calculates a first coordinate in a first coordinate system of the tablet based on the position detected by the tablet. In a second mode that is switched from the first mode in response to a predetermined operation, the computer calculates a second coordinate in a second coordinate system of the VR space that is different from the first coordinate system based on the position of the tracker detected by the tracking device.