VR Headset Zoom Control via Head Displacement Vectors
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Solution Overview
Problem
Current VR technology lacks an effective method for users to zoom in or out on images displayed on VR devices, relying on buttons or screen touch, which is not intuitive or immersive.
Innovation Solution
A method and device that identify user postures through head displacement vectors and angular velocities to control zooming in and out, using a three-dimensional coordinate system to determine zooming postures and focus points, allowing for intuitive image manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If buttons or screen touch controls are used for zooming, then zooming function is achieved, but ease of operation deteriorates due to lack of intuitiveness and immersion
Solution Approach 1:
The patent replaces mechanical button pressing or screen touching with head motion detection. The VR device uses sensors to detect head displacement vectors and angular velocities, converting physical head movements into zooming commands. This substitution eliminates the need for manual controls while making the operation more intuitive and immersive, as users naturally move their heads to focus on different parts of an image.
2Ease of operation
If head motion detection is implemented for zooming, then ease of operation improves through intuitive control, but device complexity increases due to sensor requirements
Solution Approach 1:
The patent leverages the multi-functionality of existing VR device sensors. The same sensors that track head position and orientation for general VR navigation are also utilized for detecting zooming gestures. By analyzing head displacement vectors and angular velocities from these existing sensors, the system achieves zooming functionality without adding dedicated hardware, thus managing device complexity while improving ease of operation.
Solution Approach 2:
The patent changes the interpretation parameters of sensor data. Instead of using raw head position data solely for navigation, the system analyzes specific parameters such as displacement vector magnitude and angular velocity thresholds to distinguish zooming gestures from normal head movements. This parameter-based differentiation enables intuitive zooming control using existing sensor capabilities.
3Measurement precision
If zooming is performed without focus detection, then device complexity is reduced, but measurement precision deteriorates in determining zoom center
Solution Approach 1:
The patent introduces an intermediary approach by using head displacement and angular velocity as mediators to infer zoom intent and determine zoom center. Instead of directly measuring eye focus, the system uses head motion patterns as an intermediate indicator. The zoom center is calculated based on the direction and magnitude of head movement, providing sufficient precision for zooming operations without the complexity of direct eye tracking hardware.
Data Source
AI summary
A device and a method for zooming in/out on an image on a virtual reality (VR) device are provided. The method may include: identifying that a posture of a user of the VR device is at least one of a zooming in posture and a zooming out posture, based on a displacement vector of a head of the user; zooming in the image in response to a zooming in condition being satisfied, wherein the zooming in condition comprises the posture of the user being the zooming in posture; and zooming out the image, in response to a zooming out condition being satisfied, wherein the zooming out condition comprises the posture of the user being the zooming out posture.