Electronic Pen Position Detection for Precise 3D VR Drawing
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Solution Overview
Problem
Existing technologies face issues with reduced precision and response speed in detecting the position coordinates and inclination of an electronic pen, particularly in peripheral regions of the sensor, and struggle with coordinate detection in three-dimensional spaces.
Innovation Solution
An input device that includes a sensor, detection circuit, processors, and memory devices to detect a first position in a two-dimensional space and generate position information in a three-dimensional space, incorporating a spatial position detector to capture posture information such as inclination and rotation of the electronic pen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a plurality of loop coils are used to detect position coordinates and inclination in a two-dimensional space, then position detection is enabled, but precision is reduced in peripheral regions and inclination detection becomes difficult
Solution Approach 1:
The patent transitions from two-dimensional position detection using loop coils to three-dimensional position detection using a sensor that detects positions in both two-dimensional space and three-dimensional space. This dimensional expansion enables accurate detection in peripheral regions and allows for comprehensive inclination detection, resolving the limitations of the two-dimensional approach.
2Speed
If a sensor is contained in or attached to the electronic pen to measure motion and direction, then response speed improves, but precision of position coordinates may be reduced depending on conditions
Solution Approach 1:
The patent introduces a position detection device as an intermediary system that receives detection outputs from the sensor in the electronic pen and processes this information to determine position coordinates and inclination. This intermediary processing ensures both rapid response from the sensor and high precision through systematic calculation, resolving the trade-off between speed and precision.
3Device complexity
If position detection is performed only in two-dimensional space, then detection is straightforward, but three-dimensional position and posture information cannot be obtained
Solution Approach 1:
The patent implements a position detection device capable of detecting positions in both two-dimensional space and three-dimensional space. This allows the system to maintain simplicity for basic two-dimensional operations while simultaneously capturing comprehensive three-dimensional position and posture information, eliminating information loss without excessive complexity.
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
The device enhances precision and response speed in detecting electronic pen positions and postures, enabling seamless transitions between two-dimensional and three-dimensional drawing operations without coordinate displacement, supporting applications in virtual and augmented reality environments.
Implementation Method 1
signals are exchanged between the electronic pen and the position detection device provided with the sensor through electromagnetic inductive coupling, capacitive coupling, or the like
Implementation Method 2
signals are exchanged between the electronic pen and the position detection device provided with the sensor through electromagnetic inductive coupling, capacitive coupling, or the like
Data Source
AI summary
A Virtual Reality (VR) image generation system includes a sensor; a detection circuit which, in operation, detects a first indicated position indicated by an electronic pen in a first three-dimensional space in accordance with transfer of a signal between the electronic pen and the sensor; one or more processors; and one or more memory devices storing instructions that, when executed by the one or more processors, cause the one or more processors to: detect a first posture of the electronic pen in a second three-dimensional space, the first posture including at least one of a first inclination angle, a first inclination direction and a first rotation angle of the electronic pen, and generate, when the electronic pen is in the first three-dimensional space, a first VR image of drawing by the electronic pen, based on the first indicated position and the first posture.