Light-field Display Micro-lens Alignment Color Brightness Correction
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Solution Overview
Problem
Traditional 2D displays lack depth information, leading to reduced effectiveness in harnessing the brain's visual processing capabilities, and 3D light-field displays experience luminance and chromatic aberration issues when viewed from extreme angles, causing brightness and color degradation.
Innovation Solution
The implementation of spatially addressable color correction matrices (SACCMs) to adjust pixel values based on the radial distance of light emitters from the lens center, ensuring consistent color and brightness across different viewing angles by using a SACCM index map and set of SACCMs to compensate for luminance and chromatic aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If light rays are projected through micro-lenses to create 3D light-field display, then depth information and 3D perception are improved, but luminance and chromatic aberration occur causing brightness and color degradation at extreme viewing angles
Solution Approach 1:
The patent applies different color correction matrices to different spatial regions of the display. Each pixel or pixel group is associated with a specific color correction matrix based on its position relative to the micro-lens center, enabling localized compensation for position-dependent luminance and chromatic aberration effects
Solution Approach 2:
The patent dynamically adjusts color and brightness parameters of individual pixels based on their radial distance from the lens center. By modifying emission parameters (intensity, color temperature) according to position, the system compensates for optical aberrations and maintains uniform perception across different viewing angles
2Loss of information
If light rays are projected through micro-lenses to create 3D light-field display, then depth information and 3D perception are improved, but color accuracy deteriorates due to chromatic aberration at extreme viewing angles
Solution Approach 1:
The patent applies different color correction matrices to different spatial regions of the display. Each pixel or pixel group is associated with a specific color correction matrix based on its position relative to the micro-lens center, enabling localized compensation for position-dependent luminance and chromatic aberration effects
Solution Approach 2:
The system uses pre-characterized color correction matrices that were determined through measurement or simulation of the optical system's chromatic aberration. This feedback mechanism allows the display to compensate for optical imperfections and maintain color accuracy across the full viewing angle range
3Manufacturing precision
If uniform color and brightness are maintained across viewing angles using color correction, then image fidelity is improved, but computational complexity and processing time increase
Solution Approach 1:
The patent pre-calculates and stores multiple color correction matrices corresponding to different radial distances from the lens center. During operation, the system only needs to look up the appropriate matrix based on pixel position and apply it, avoiding real-time complex calculations and reducing processing complexity
Solution Approach 2:
The patent divides the display into multiple zones based on radial distance from the lens center, with each zone using a specific color correction matrix. This segmentation approach simplifies the correction process by avoiding the need for continuous complex calculations across the entire display area
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
This solution enhances the color and brightness uniformity of 3D images across various viewing perspectives, improving the overall fidelity and perception of 3D light-field displays by accounting for the position-dependent refraction effects.
Implementation Method 1
A 3D light-field display projection (hereinafter 3D projection or 3D image) can be reconstructed by projecting light rays through micro-lenses (hereinafter lenses)
Implementation Method 2
an array of spatial light modulators (SLMs) 202... Each SLM 202 includes an array of light emitters
Data Source
AI summary
A light-field display with pixel to micro-lens spatial alignment adapted color or brightness. In one embodiment, a first pixel is read from memory. A map is accessed to read a first index that is mapped to a first position of a first emitter in an array of emitters. A first correction data mapped to the first index is read. The first pixel is adjusted using the first correction data. The first emitter emits light based on the adjusted first pixel.