Color Calibration Display Module for AR Immersion
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Solution Overview
Problem
Conventional augmented reality display apparatuses using projection optical systems face significant challenges with color accuracy and contrast due to external lighting variations, leading to decreased immersion and expression capabilities.
Innovation Solution
A color calibration display apparatus with a photochromic glass or active type lens that adjusts color based on ambient illuminance, utilizing an illuminance sensor and controller to optimize image brightness and contrast, and a secondary display with adjustable transmittance for improved color expression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a projection optical system is used in augmented reality display apparatus, then the real world can be used as a background image, but color accuracy deteriorates due to external lighting variations
Solution Approach 1:
The patent applies a variable transmittance filter that dynamically adjusts its light transmission properties based on ambient illuminance conditions. The filter transitions from a fixed state to a dynamically adjustable state, allowing the system to adapt to varying external lighting conditions while maintaining color accuracy in augmented reality displays.
Solution Approach 2:
The patent changes the transmittance parameter of the optical filter based on detected ambient illuminance levels. By adjusting this physical parameter in response to environmental conditions, the system compensates for external lighting variations and maintains consistent color accuracy across different viewing environments.
2Measurement precision
If a visor with optical coating is mounted to block external light, then color accuracy improves, but light transmittance becomes fixed and cannot adapt to environmental changes
Solution Approach 1:
The patent replaces the static visor with a dynamic variable transmittance filter that can adjust its light transmission properties in real-time. This dynamic component responds to ambient illuminance changes, allowing the system to maintain color accuracy while adapting to different environmental lighting conditions throughout the day.
Solution Approach 2:
The patent incorporates an illuminance sensor that detects ambient light conditions and provides feedback to control the transmittance of the filter. This closed-loop feedback mechanism ensures the filter automatically adjusts to maintain optimal color accuracy regardless of external lighting variations.
3Object-affected harmful factors
If a visor with fixed light reflectance is used, then external light blocking is achieved, but immersion sensation decreases due to inability to reflect light transmittance changes
Solution Approach 1:
The patent employs a variable transmittance filter that dynamically adjusts between blocking and transmitting light based on ambient conditions. This dynamic adjustment maintains the illusion of a stable virtual environment, thereby preserving immersion sensation while still providing external light blocking when necessary.
Solution Approach 2:
The illuminance sensor provides continuous feedback about external lighting conditions, enabling the filter to automatically adjust its transmittance. This feedback mechanism ensures the display maintains consistent visual properties for the user, preserving immersion by compensating for environmental light variations.
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 solution maintains consistent color expression and contrast by compensating for external light interference, enhancing user immersion and display performance in varying environments.
Implementation Method 1
a color calibration display module configured to, when the image light generated by the display projector is projected onto the projection optical system and reflected by the projection optical system to enter eyes of the user, change color in response to an amount of light incident from the outside
Implementation Method 2
an illuminance sensor mounted in front of the frame on an optical path of the projection optical system and provided as at least one sensor for detecting external illuminance
Data Source
AI summary
A switchable display system for providing virtual reality or augmented reality using a color calibration display apparatus may comprise: an augmented reality data server configured to provide virtual reality and augmented reality information; and a color calibration display apparatus using a color calibration display module configured to perform color calibration according to ambient illuminance in a use environment.