Head-Mounted Display Virtual Space Synchronization

Solution Overview

Problem

Existing head-mounted display systems often cause VR sickness when the virtual camera moves backward, at high speed, or in curved motions, leading to user discomfort and reduced immersion.

Innovation Solution

A method and system that generate a sight line guiding region to cover part of the field of view when the virtual camera updates without synchronization with the head-mounted display's movement, reducing information intake and enhancing predictability while maintaining immersion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the virtual camera is moved backward, moved at high speed, or moved in a curved motion to update the visual-field image, then the user's sense of immersion in the virtual space is improved, but the user becomes more susceptible to VR sickness

Engineering Contradiction:

Improvesense of immersionVSAvoidVR sickness

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies partial action by selectively applying motion blur only to regions of the visual field that have moved relative to the user's head position, rather than blurring the entire field of view. This partial application reduces the harmful visual conflicts that cause VR sickness while preserving immersion in the dynamic regions where camera movement occurs.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent implements local quality by differentiating the treatment of different regions in the visual field. Motion blur is applied locally to areas that have undergone displacement relative to the user's head, while stationary regions remain clear. This localized approach allows immersive camera movements without uniformly degrading visual quality across the entire field of view.

Inventive Principle:

Principle #3Local quality

2Productivity

If the image of the field of view is updated without synchronization with the movement of the head mounted display, then the visual-field image can be changed independently, but the user experiences increased VR sickness

Engineering Contradiction:

Improveimage update efficiencyVSAvoidVR sickness

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies partial action by selectively applying motion blur only to portions of the image that have moved relative to the user's head position, rather than blurring the entire field of view. This partial application reduces the harmful visual conflicts that cause VR sickness while preserving immersion in the dynamic regions where camera movement occurs.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent implements preliminary action by pre-calculating the relative movement between the virtual camera and the user's head position before rendering the image. By determining which regions will move and applying motion blur in advance to those specific areas, the system prepares the visual information to reduce VR sickness before the user actually experiences the unsynchronized update.

Inventive Principle:

Principle #10Preliminary action

3Object-affected harmful factors

If motion blur is applied to reduce VR sickness, then the user comfort is improved, but the image quality and clarity are degraded

Engineering Contradiction:

Improveuser comfortVSAvoidimage quality

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The patent implements local quality by differentiating the treatment of different regions in the visual field. Motion blur is applied locally to areas that have undergone displacement relative to the user's head, while stationary regions remain clear. This localized approach allows immersive camera movements without uniformly degrading visual quality across the entire field of view.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent applies partial action by selectively applying motion blur only to portions of the image that have moved relative to the user's head position, rather than blurring the entire field of view. This partial application reduces the harmful visual conflicts that cause VR sickness while preserving immersion in the dynamic regions where camera movement occurs.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS10573062B2Method and system for providing a virtual space

Publication Date: 2020.02.25 COLOPL

AI summary

A method including defining a virtual space for immersing a user. The method further includes defining a field of view of a head mounted display. The method further includes generating an image of the field of view based on the virtual space that is visually recognizable by the user. The method further includes updating the image of the field of view in synchronization with movement of the head mounted display. The method further includes generating the image of the field of view including a guiding region which covers a part of the virtual space for guiding a sight line of the user when the image of the field of view is updated without synchronization with the movement of the head mounted display. The method further includes displaying the image of the field of view on the head mounted display.