Splicing Display Color Calibration via Reference Gamut Standard
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Solution Overview
Problem
Splicing display systems face color inconsistency due to individual differences between display devices, which worsens with variations in color depth and aging, requiring labor-intensive adjustments without a standard reference, leading to potential human errors and noticeable color differences between adjacent displays.
Innovation Solution
A color calibration method that initializes displays, sets a reference display with the smallest gamut, adjusts color temperature, brightness, and six-axis hue and saturation to reference values, and calibrates other displays to match these settings, ensuring consistent visual effects across multiple displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If technicians manually adjust each display device one by one, then color calibration can be performed, but the process becomes time-consuming and labor-intensive
Solution Approach 1:
The patent introduces a color reference standard as an intermediary object to mediate the calibration process. Instead of technicians directly adjusting each display, the color reference standard serves as a mediator that provides objective color measurements, enabling automated calibration algorithms to adjust display parameters based on measured deviations from the reference standard.
Solution Approach 2:
The patent replaces the manual mechanical adjustment process with an automated electronic calibration system. The system uses color sensors to measure display output and automatically adjusts display parameters through electronic control, eliminating the need for manual visual assessment and physical adjustment of each display device.
2Ease of operation
If technicians use visual recognition for calibration, then adjustments can be made, but human errors occur due to subjective perception
Solution Approach 1:
The patent replaces the human visual recognition system with an automated color measurement system using color sensors and standardized color reference materials. This substitution eliminates subjective human perception and reduces calibration errors by using objective, quantifiable color measurements based on international color standards.
Solution Approach 2:
The patent transforms the calibration process from subjective visual assessment to objective parameter-based measurement. By using color sensors to measure specific color parameters (such as chromaticity coordinates, brightness, and color temperature) and comparing them against standardized reference values, the system enables precise, repeatable calibration based on measurable parameters rather than human perception.
3Adaptability or versatility
If displays with different gamuts are used in splicing, then display flexibility increases, but color inconsistency worsens
Solution Approach 1:
The patent addresses gamut differences by dynamically adjusting display parameters (such as RGB gain, offset, and gamma) based on measured gamut characteristics. The system characterizes each display's gamut using color sensors and reference standards, then applies compensatory parameter adjustments to achieve consistent color output across displays with different native gamuts, enabling flexible display configurations while maintaining color consistency.
Data Source
AI summary
A calibration method for splicing displays including initializing a plurality of displays, obtaining the gamuts of the displays, setting a display with the smallest gamut among the displays as the reference display, adjusting the color temperature, brightness and six-axis hue and saturation of the reference display respectively to a reference color temperature, a reference brightness and reference RGB coordinates, and adjusting the displays according to the reference color temperature, the reference brightness and the reference RGB coordinates.