VR Display Non-Uniformity Calibration via Dimensionality Reduction
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Solution Overview
Problem
Virtual reality systems face non-uniformities in pixel luminance and color balance due to manufacturing variations, leading to decreased image quality and immersion.
Innovation Solution
A display calibration system measures and compensates for these non-uniformities by generating a condensed representation of luminance or color balance across display regions, applying statistical analysis to reduce dimensionality and store correction values, thereby calibrating the electronic display to reduce spatial inconsistencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full non-uniformity measures for each display region are stored, then image quality calibration is improved, but memory usage and manufacturing cost increase
Solution Approach 1:
The patent extracts only the essential calibration information needed for display uniformity correction by separating the full non-uniformity measures into a condensed representation that captures only the critical variations. This extraction process removes redundant data while preserving the necessary calibration parameters, thereby reducing memory requirements without sacrificing calibration effectiveness.
Solution Approach 2:
The patent transforms the calibration data from a high-dimensional representation (full non-uniformity measures for each display region) to a low-dimensional condensed representation by changing the parameter structure. This parameter transformation maintains the essential calibration information while significantly reducing the quantity of data that needs to be stored and processed.
2Measurement precision
If detailed non-uniformity measures are stored in dedicated memory, then calibration accuracy is improved, but device weight and power consumption increase
Solution Approach 1:
The patent extracts only the essential calibration parameters needed for accurate display uniformity correction, storing them in a condensed format that requires less memory capacity. This extraction eliminates redundant data storage and retrieval operations, thereby reducing power consumption while maintaining calibration accuracy.
Solution Approach 2:
The patent applies partial action by storing only the necessary portion of calibration data (the condensed representation) rather than the complete non-uniformity measures. This partial storage approach provides sufficient calibration accuracy for practical purposes while significantly reducing the energy required for memory operations.
3Measurement precision
If comprehensive non-uniformity data is stored, then display calibration quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts the essential calibration information from the complete non-uniformity measures, creating a condensed representation that can be stored in existing memory resources without requiring additional dedicated memory components. This extraction approach maintains high calibration quality while avoiding the increased manufacturing costs associated with adding specialized storage hardware.
Solution Approach 2:
The patent makes the existing memory resources multi-functional by using them to store both the condensed calibration data and other system data. This universal usage of existing memory components eliminates the need for additional dedicated memory hardware, thereby reducing manufacturing costs while preserving calibration accuracy.
Data Source
AI summary
An electronic display is driven to compensate for non-uniformity in a display property across display regions of the electronic display. Non-uniformity measures are determined for a set of electronic displays. A transformation is determined for converting the non-uniformity measures to transformed non-uniformity representations having fewer dimensions than a total number of the display regions in an electronic display. Using the transformation, a transformed non-uniformity representation for the electronic display is generated and stored, and an inverse transform is determined and stored. A system containing the electronic display generates correction values for the display regions by applying the inverse transformation to the transformed non-uniformity representation. Input display data for the electronic display is modified according to the generated correction values for the display regions. The electronic display is driven according the modified display data.