Electronic Pen Input with Hybrid 3D Position and Posture Detection
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Solution Overview
Problem
Existing technologies face challenges in accurately detecting the position and inclination of an electronic pen, particularly in peripheral regions of the sensor section, leading to reduced precision and response speed.
Innovation Solution
An input device that combines a digitizer with a spatial position detection unit, utilizing electromagnetic induction and optical tracking to detect the position and posture of an electronic pen in both planar and spatial regions, enabling precise and responsive 3D drawing and virtual reality image generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If electromagnetic induction method is used for position detection, then response speed is improved, but measurement precision deteriorates in peripheral regions
Solution Approach 1:
The patent combines two detection methods: electromagnetic induction for central regions (high response speed) and optical detection for peripheral regions (high precision). The position detection unit integrates both methods to detect pen positions across the entire input surface, with each method operating in its optimal performance zone.
Solution Approach 2:
The patent applies different detection methods to different spatial regions of the input surface. The electromagnetic induction method is used for the central region where fast response is critical, while the optical detection method is used for peripheral regions where precision is more important. This local differentiation optimizes overall system performance.
2Speed
If electromagnetic induction method is used for inclination detection, then response speed is improved, but measurement precision deteriorates
Solution Approach 1:
The patent merges electromagnetic induction for detecting pen inclination in the central region with optical detection for inclination in peripheral regions. The inclination detection unit processes signals from both methods to determine pen orientation, leveraging the speed of electromagnetic induction and the precision of optical detection.
Solution Approach 2:
Different detection approaches are applied to inclination detection based on spatial location. Electromagnetic induction signals are processed for central region inclination detection, while optical detection signals are processed for peripheral region inclination detection, optimizing precision in each zone.
3Measurement precision
If optical detection method is used, then measurement precision is improved, but response speed deteriorates
Solution Approach 1:
The position detection unit combines electromagnetic induction signals and optical detection signals to detect pen positions. By merging both methods, the system achieves both the high response speed of electromagnetic induction and the high precision of optical detection across the entire input surface.
4Area of stationary object
If sensor section is enlarged to cover peripheral regions, then detection coverage is improved, but measurement precision deteriorates in peripheral regions
Solution Approach 1:
The patent extends detection coverage to peripheral regions by incorporating optical detection, which complements the electromagnetic induction method. The optical detection unit is specifically designed to detect pen positions in peripheral regions where electromagnetic induction alone provides insufficient precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables seamless transition between 3D drawing and virtual reality operations by accurately detecting pen position and posture, ensuring high precision and response speed, without requiring the electronic pen or digitizer to have intrinsic posture detection capabilities.
Implementation Method 1
signals are exchanged between the electronic pen and the position detection device provided with the sensor section through electromagnetic inductive coupling
Implementation Method 2
an optical detection unit that detects a position of the electronic pen in a three-dimensional space in which the electronic pen exists
Data Source
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AI summary
Provided is an input device that enables a position indicated by an electronic pen and a pen posture thereof in a three-dimensional space to be detected in a satisfactory manner in view of precision and response speed. This input device includes: a first detection section configured to detect a first indicated position indicated by an electronic pen in accordance with transfer of a signal between the electronic pen and the first detection section; a second detection section configured to detect a second indicated position indicated by the electronic pen in a three-dimensional space in which the electronic pen exists; and a control section configured to control whether or not the second indicated position is to be outputted in place of the first indicated position.