LCD Color Gamut Mapping Engine for Accurate Display Rendering

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Solution Overview

Problem

Color management systems in LCD devices may fail to accurately recognize and adjust to the display's characteristics, leading to less accurate image rendering if the LCD device does not correctly identify itself or provide matching data, especially in color-critical environments.

Innovation Solution

The implementation of a color gamut mapping engine within the LCD device, combined with an RGB LED backlight, allows the device to adapt and emulate various standard output device specifications by adjusting input values and properties such as white point and luminance, enabling accurate color representation without the need for additional color management from the video source.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the LCD device provides identification data to the color management system, then the color management system can configure correctly, but the device complexity increases due to the need for accurate identification and data matching mechanisms

Engineering Contradiction:

Improvecolor characterization accuracyVSAvoididentification data mechanism

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The LCD device includes an on-board color gamut mapping engine that performs color space transformations independently without requiring external color management processing. The device self-characterizes its color properties through embedded lookup tables and mapping algorithms, eliminating the need for complex external identification and calibration systems while maintaining accurate color reproduction.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent introduces an intermediary color gamut mapping engine within the LCD device that acts as a bridge between the input signal and the display panel. This engine contains pre-configured lookup tables for multiple color spaces (sRGB, AdobeRGB, DCI-P3) and performs automatic color space transformation, serving as a mediator that eliminates the need for complex external color management systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the color management system processes image data to compensate for display characteristics, then color accuracy can be improved, but the processing time and complexity increase

Engineering Contradiction:

Improvecolor accuracyVSAvoidimage processing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The color gamut mapping engine includes pre-configured lookup tables for multiple standard color spaces (sRGB, AdobeRGB, DCI-P3) that are prepared in advance. When a color space is selected, the corresponding lookup table is immediately applied without requiring real-time calculation or external processing, thus maintaining color accuracy while minimizing processing time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the approach from real-time color management processing to using pre-calculated lookup tables with different color space parameters. By switching between pre-configured parameter sets (different color spaces) rather than performing complex real-time transformations, the system achieves accurate color reproduction with minimal processing delay.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the LCD device supports multiple color space presets, then the adaptability to different color standards is improved, but the device complexity increases due to additional configuration options

Engineering Contradiction:

Improvecolor space compatibilityVSAvoidpreset configuration system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The LCD device incorporates a universal color gamut mapping engine that supports multiple standard color spaces (sRGB, AdobeRGB, DCI-P3) through a single integrated system. The engine contains embedded lookup tables for all major color standards and can switch between them via a unified interface, providing multi-functionality without requiring separate hardware or complex configuration systems for each color space.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Device complexity

If external color management systems are eliminated, then the device simplicity is improved, but the reliability of color accuracy may worsen

Engineering Contradiction:

Improvesystem architectureVSAvoidcolor accuracy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The LCD device performs color space transformations independently using an on-board gamut mapping engine with embedded lookup tables for multiple color spaces. This self-service capability eliminates the need for external color management systems while maintaining reliable color accuracy through pre-configured, factory-calibrated transformation data.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8310502B2System and method for adjusting display input values

Publication Date: 2012.11.13 HEWLETT PACKARD DEVELOPMENT COMPANY LP

AI summary

Systems and methods of providing user-selected color characteristics for an LCD device to a host system are disclosed. An exemplary method includes receiving user input at the LCD device, the user input specifying color information for each of a plurality of color presets selected by the user. The method also includes each time the user changes color information for each of the plurality of color presets selected by the user, merging the color information with static information for the LCD device. The method also includes communicating the merged color information and static information to the host system in a standardized format.