Face Illumination Matching in VR Headsets
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Solution Overview
Problem
Existing Head-Mounted Display (HMD) systems for virtual reality struggle to selectively illuminate specific parts of a user's face with varying colors and intensities, leading to discrepancies between the simulated environment's illumination and the user's actual face illumination, which can disrupt the virtual reality experience.
Innovation Solution
A system comprising an illumination unit and a control unit that work in conjunction with a computing unit to create a three-dimensional model of the user's face. The control unit receives information about the illumination of the face model in the simulation and adjusts the illumination unit to match this illumination, ensuring that the user's face is illuminated in a manner that corresponds to the simulated environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display brightness is increased to illuminate the user's face in a bright simulation environment, then the illumination of the face is improved, but the nose is over-illuminated due to its raised architecture reflecting more light
Solution Approach 1:
The patent applies local quality by providing separate illumination control for different facial regions. Instead of uniform illumination, the system uses multiple light sources positioned at different locations (e.g., above and below the nose) to independently control lighting in specific areas like the nose, cheeks, and forehead, matching the simulated environment's directional lighting precisely
Solution Approach 2:
The illumination system is segmented into multiple independent light sources rather than using a single display screen. These discrete light sources can be individually controlled to illuminate specific facial regions, allowing precise reproduction of complex lighting scenarios including shadows and directional light sources
2Illumination intensity
If the display brightness is decreased to illuminate the user's face in a dark simulation environment, then the illumination of the face is improved, but the nose appears overly illuminated due to reflection
Solution Approach 1:
The system provides localized illumination control for the nose area by positioning light sources specifically above and below the nose. This allows independent adjustment of lighting in this region to match the simulated environment, preventing over-illumination while maintaining appropriate lighting in other facial areas
Solution Approach 2:
The system uses a 3D model of the user's face generated from optical information to calculate accurate illumination directions. This feedback loop allows the system to continuously adjust light source positions and intensities based on the actual facial geometry and simulated lighting conditions, ensuring precise illumination matching
3Device complexity
If a single display screen is used to illuminate the user's face, then the device complexity is low, but the ability to selectively illuminate specific facial parts with varying colors and intensities is limited
Solution Approach 1:
The illumination system is divided into multiple independent light sources positioned at different locations around the face. Each light source can be independently controlled to illuminate specific regions, enabling selective illumination of different facial parts with varying colors and intensities to match complex simulated environments
Solution Approach 2:
The system transitions from a two-dimensional display screen to a three-dimensional illumination arrangement with light sources positioned at multiple spatial locations. This dimensional change enables selective illumination of specific facial regions from different angles, providing the versatility needed to match complex virtual lighting scenarios
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 system effectively enhances the realism of virtual reality by ensuring that the illumination of the user's face closely matches the simulated environment, thereby reducing subconscious perception of discrepancies and improving the overall virtual reality experience.
Implementation Method 1
an illumination unit (2) designed to variably illuminate at least a part of a face (3) of the user
Data Source
AI summary
The disclosure relates to a system for providing a simulation-based virtual reality to a user, and includes an illumination unit to illuminate at least a part of a face of the user and a control unit. The control unit receives information from a computing unit. The computing unit creates a model of the face from three-dimensional information relating to the face to create the simulation, The model of the face is used for creating the simulation, to calculate an illumination of the model of the face in the simulation, and to transmit information to the control unit. The control unit controls the illumination unit based on the information from the computing unit regarding the illumination of the model of the face in the simulation such that an illumination of the face by the illumination unit corresponds to the illumination of the model of the face in the simulation.