Position Indicator Grip-Force Sensing for VR Stroke Control
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Solution Overview
Problem
Existing pen-type position indicating devices struggle to control line width and transparency in virtual reality environments without a physical touch surface, as pen pressure sensors cannot detect pressure, hindering the simulation of traditional writing experiences.
Innovation Solution
A position indicating device with a housing and pressure sensors that detect gripping force, combined with an information processing device capable of receiving and processing these forces to control line width and transparency in virtual reality spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pen pressure sensor is used to detect pen pressure on a touch surface, then line width and transparency can be controlled according to pen pressure, but this method cannot be applied in virtual reality environments without a physical touch surface
Solution Approach 1:
The patent copies the pen pressure detection function by using a force sensor to detect gripping force, which is then converted into equivalent pen pressure values. This allows the system to simulate traditional pen pressure effects in a virtual reality environment without a physical touch surface, resolving the contradiction between adaptability and measurement precision.
2Ease of operation
If the pen pressure sensor detects pressure applied to the pen tip, then writing feel similar to traditional pens can be produced, but this configuration is ineffective when there is no actual touch surface
Solution Approach 1:
The patent replaces the mechanical pen pressure sensor system with a force sensor that detects gripping force. This substitution enables the system to function in virtual reality environments while maintaining the ability to control line width and transparency, thereby improving ease of operation and adaptability simultaneously.
3Adaptability or versatility
If a pressure sensor on the side surface detects gripping force, then character and figure input without touch surface is enabled, but line width and transparency control in virtual reality space cannot be achieved
Solution Approach 1:
The patent changes the parameter being measured from gripping force alone to a combination of gripping force and spatial position information. By processing these parameters together, the system achieves both virtual reality drawing capability and proper control of line width and transparency, resolving the contradiction between adaptability and ease of operation.
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 3D drawing with controlled line width and transparency by correlating gripping force with pen pressure, simulating traditional writing experiences in virtual reality environments.
Implementation Method 1
a first sensor which, in operation, detects a first pressure applied to the position indicator
Implementation Method 2
a second sensor which, in operation, detects a second pressure applied to the housing
Data Source
AI summary
A position indicating device includes a housing, a position indicator which, in operation, indicates a position, a first pressure sensor which, in operation, detects a pressure applied to the position indicator, a second sensor which, in operation, detects a second pressure applied to the housing, a first communication circuit which, in operation, transmits the pen pressure detected by the pen pressure sensor, and a second communication circuit which, in operation, transmits the gripping force detected by the gripping force sensor. The position indicating device enables control of a line width and transparency in a preferable manner even when there is no actual touch surface.