Color Signal Conversion Table for Accurate Object Reproduction

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Solution Overview

Problem

Display devices struggle to accurately reproduce the color of objects, particularly in electronic commerce and remote diagnosis, due to inherent limitations in color representation, which affects the reliability of commercial transactions and medical decisions.

Innovation Solution

A color difference adjustment method and system that generates and displays image data using a color signal conversion table and adjusted image data to match the color of the displayed image with the actual object, involving the creation of a color signal conversion table through standard color signal data measurement and adjustment of image data to ensure high color reproducibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a display device is used to display images of objects, then the convenience of visual confirmation is improved, but the color accuracy between the displayed image and the actual object deteriorates

Engineering Contradiction:

Improveconvenience of visual confirmationVSAvoidcolor accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

A color signal conversion table is introduced as an intermediary between the image data and the display device. This conversion table contains predetermined color signal adjustments that compensate for the specific display device's color characteristics, enabling accurate color reproduction without requiring physical calibration equipment or complex real-time measurements.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The color signal conversion table is created in advance through preliminary calibration processes. The table stores pre-calculated color signal adjustments that are applied before image display, eliminating the need for real-time color measurement and adjustment during actual use. This preliminary preparation enables consistent color accuracy across multiple display operations.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If an ambient light sensor is attached to the display device for color calibration, then color reproduction accuracy is improved, but the device complexity and cost increase

Engineering Contradiction:

Improvecolor reproduction accuracyVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

Instead of requiring physical sensors or direct measurement during operation, the invention creates a digital copy of the display device's color characteristics through the color signal conversion table. This virtual model allows the system to compensate for color inaccuracies using software-based color signal adjustments rather than hardware sensors.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The calibration function is extracted from the display device itself and implemented separately through the color signal conversion table. This allows standard display devices without built-in sensors to achieve calibrated color output by applying the pre-created conversion table, separating the calibration capability from the display hardware.

Inventive Principle:

Principle #2Taking out (Extraction)

3Stability of the object's composition

If color calibration is performed for each display device, then color consistency across devices is improved, but the time and resources required for calibration increase

Engineering Contradiction:

Improvecolor consistencyVSAvoidcalibration time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The color calibration is performed once in advance to create the color signal conversion table, which then can be applied repeatedly without requiring repeated calibration procedures. This preliminary calibration action saves time during actual image display operations while maintaining consistent color reproduction across multiple uses.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The color signal conversion table serves multiple functions: it compensates for the specific display device's color characteristics, enables accurate color reproduction, and can be applied to various images and applications. This universal application reduces the need for repeated calibration processes across different use cases.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11145274B2Color difference adjustment image data generation method, color difference adjustment image display method, color difference adjustment image data generating device, and color difference adjustment image display system

Publication Date: 2021.10.12 SANYO CYP CO LTD

AI summary

A color difference adjustment image data generation method includes generating a color signal conversion table, generating adjusted image data, and generating color difference adjustment image data. The color signal conversion table is used for converting color signals in one of a color difference adjustment image data generating device and a display device into color signals in the other. The adjusted image data is generated by adjusting image data of a display object so that color of an image of the display object being displayed by the color difference adjustment image data generating device according to the image data matches color of the display object. The color difference adjustment image data is generated based on the adjusted image data and the color signal conversion table.