Matrix Display Color Calibration Using Filtered Static Imaging

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Solution Overview

Problem

Existing matrix display calibration methods are costly, time-consuming, and inaccurate due to the need for expensive equipment and complex setups, failing to account for slight spectral differences among LEDs, leading to visible color variations.

Innovation Solution

A method and system using available information about similar LEDs, combined with static image acquisition and selective filters, determine color coordinates by computing moments of the emitter spectrum and utilizing a reference database to estimate color coordinates without requiring expensive spectrometers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional spectroradiometers are used for calibration, then measurement precision is improved, but device complexity and cost increase

Engineering Contradiction:

Improvecolor coordinates measurement precisionVSAvoidcalibration system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent uses a color camera to capture images of LED emitters, creating a digital copy of the light emission. This image data is then processed to extract color information, replacing the need for complex spectroradiometer hardware while maintaining measurement capability through computational analysis of the captured images

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent replaces mechanical/optical measurement systems (spectroradiometers with moving parts and complex optical paths) with a static digital imaging system. The color camera captures spatial and spectral information simultaneously, eliminating mechanical scanning components while achieving comparable color measurement precision through image processing algorithms

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If spectrometers are used for individual LED measurement, then measurement precision is improved, but productivity decreases

Engineering Contradiction:

Improveindividual LED color measurement precisionVSAvoidcalibration speed

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent merges multiple measurement functions into a single color camera system. The camera simultaneously captures spatial information (position of each LED) and spectral information (color characteristics) in one shot, eliminating the need for sequential measurements with spectrometers and achieving both high precision and high productivity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent adds the spatial dimension to color measurement by using image data. Instead of measuring one LED at a time with a spectrometer, the color camera captures all LEDs across the display simultaneously in two spatial dimensions, enabling parallel processing of hundreds of LED color measurements without sacrificing precision

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Device complexity

If traditional RGB filters are used for color measurement, then device complexity is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvefilter system complexityVSAvoidcolor coordinates accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent changes the measurement parameters by using a color camera with known spectral sensitivity characteristics instead of traditional RGB filters. The system captures full spectral information through the camera's sensor and uses computational methods to derive accurate CIE color coordinates, maintaining simplicity while improving precision through better utilization of available spectral data

Inventive Principle:

Principle #35Parameter changes

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

Accurately calibrates matrix displays with improved precision (+/−0.0015 in CIE2000) and efficiency, reducing costs and time by using affordable equipment and static imaging.

Implementation Method 1

Acquiring at least two intensity images of each emitter of the matrix with different filtering, at least one of said intensity images being acquired with filtering by at least one acquisition filters

Methodology Applied

Scientific EffectOptical filtering: Filter (optical)

Data Source

PatentUS20260045201A1Method and system for determining color coordinates of light emitters of a matrix display

Publication Date: 2026.02.12 DEEPSKY CORP LTD

AI summary

“A method is provided for determining color coordinates (XYZ) of light emitted by each emitter (R, G) of a matrix display (M), using already available information about color coordinates (XYZ) for similar light emitters with similar color characteristics other than those present in the matrix display. The method includes acquiring at least two intensity images of each emitter of the matrix with different filtering, at least one of the intensity images being acquired with filtering by at least one of said acquisition filters, and determining for each emitter of the matrix estimated color coordinates of the emitter based on the already available information and the intensity images.