Display Color Matching via Independent Spectral Mapping
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Solution Overview
Problem
Conventional display systems with multiple electronic displays of different technologies, such as OLED and LCD, often exhibit undesirable color differences due to device-specific color spaces, even when operating in supposedly-standard color spaces like sRGB, leading to inconsistencies in color output across different displays, especially under varying luminance and brightness conditions.
Innovation Solution
A method and system for color matching between electronic displays involve obtaining spectral response readings using grayscale ramping techniques, determining spectral response curves and power distributions, and creating device-to-independent color mappings to configure the display system for consistent color output across different technologies, including storing color mapping information for efficient configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple electronic displays of different technologies (OLED, LCD) are used in a display system, then the display system can provide diverse display capabilities and technologies, but color differences and inconsistencies appear among the displays
Solution Approach 1:
The patent introduces an independent color space as an intermediary between device-specific color spaces. Each display's color values are converted to the independent color space using device-to-independent color mappings, which serve as mediators to enable consistent color representation across different display technologies. This intermediary color space acts as a common reference frame that resolves the color inconsistency problem while preserving the ability to use diverse display technologies.
Solution Approach 2:
The patent changes the color representation parameters by transitioning from device-specific color spaces (sRGB, Adobe RGB) to an independent color space defined by spectral power distributions. This parameter transformation allows colors to be represented in a technology-agnostic manner, enabling consistent color output across OLED, LCD, and other display technologies by changing how colors are encoded and interpreted.
2Ease of operation
If standard color spaces like sRGB are used across different displays, then compatibility is improved, but actual color output still differs among displays due to device-specific characteristics
Solution Approach 1:
The independent color space serves as an intermediary layer between standard device color spaces and actual color output. Instead of relying solely on standard color spaces that don't account for device variations, the patent introduces this intermediate representation that captures the actual spectral characteristics of each display, enabling both compatibility and accuracy.
Solution Approach 2:
The patent performs preliminary characterization of each display's spectral response and power distribution before use. By pre-determining the device-to-independent color mappings based on measured spectral data, the system prepares accurate color transformation parameters in advance, ensuring both compatibility and color accuracy from the outset rather than attempting correction during operation.
3Manufacturing precision
If spectral response measurements are performed to determine accurate color mappings, then color matching precision is improved, but the configuration process becomes more complex
Solution Approach 1:
The patent enables the display system to self-characterize by automatically measuring spectral responses and generating device-to-independent color mappings without requiring manual intervention. The system performs its own spectral characterization and configuration, reducing the complexity burden on users while maintaining high color matching precision through automated spectral measurements and mapping generation.
Solution Approach 2:
The patent transforms the complex spectral measurement data into simplified device-to-independent color mapping parameters. By converting detailed spectral power distribution measurements into compact color mapping tables or functions, the system maintains high color matching precision while reducing the complexity of storing and processing the raw spectral data.
Data Source
AI summary
A system and method is provided for color matching two or more electronic displays of a display system. The method includes: obtaining first and second spectral response readings for first and second electronic displays from spectral response device(s); determining first and second spectral response curves based on the first and second spectral response readings; determining first and second spectral power distributions based on the first and second spectral response readings; determining a first device-to-independent color mapping based on the first spectral response curve and the first spectral power distribution; determining a second device-to-independent color mapping based on the second spectral response curve and the second spectral power distribution; and configuring a display system having the first electronic display and the second electronic display to match colors being displayed based on using the first device-to-independent color mapping and the second device-to-independent color mapping.