Color Filter Edge Detection Using Adaptive Extremum Ranges
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Solution Overview
Problem
The existing methods for determining the edges of the overlapping region between a color filter and a black matrix are inaccurate when light intensity is inappropriate or the width of the overlapping region changes, leading to incorrect edge determination.
Innovation Solution
A method involving the acquisition of a measurement area with a color filter, black matrix, and overlapping region, where original and differential gray-scale value curves are drawn, and extremums are determined based on a predetermined range. A threshold value is established based on gray-scale values to identify the edges of the overlapping region, using preset rules to adjust for varying light conditions and substrate shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the existing method of determining edges through gray-scale value differences is used, then the process is simple, but the accuracy deteriorates when light intensity is inappropriate or overlapping region width changes
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the extremum range based on the actual width of the overlapping region. Instead of using a fixed extremum range, the method calculates the overlapping region width first, then sets the extremum range as a function of this width (e.g., 0.5 to 1.5 times the width). This adaptive parameter adjustment ensures accurate edge determination regardless of variations in light intensity or overlapping region dimensions.
2Ease of operation
If a fixed extremum range is used for determining edges, then the method is straightforward, but reliability deteriorates when the overlapping region width varies or substrate shifts occur
Solution Approach 1:
The patent implements dynamics by making the extremum range adaptive rather than fixed. The method first determines the width of the overlapping region, then dynamically adjusts the extremum range according to this measured width. This dynamic adjustment mechanism allows the system to maintain reliable edge determination even when the overlapping region width varies or when substrate shifts occur, as the extremum range automatically adapts to the actual conditions.
3Device complexity
If the extremum range is not appropriately set, then the method remains simple, but measurement precision deteriorates leading to incorrect edge determination
Solution Approach 1:
The patent applies preliminary action by first calculating the width of the overlapping region before determining the edges. This preliminary measurement of the overlapping region width is used to establish an appropriate extremum range for subsequent edge detection. By performing this preliminary action, the method ensures that the extremum range is optimally set for the specific case, thereby maintaining high measurement precision without requiring complex manual configuration.
Data Source
AI summary
Disclosed is a method for determining edges of an overlapping region between a color filter and a black matrix, which comprises the following steps. An original gray-scale value curve and a differential gray-scale value curve of the measurement area to be detected are drawn, and extremums of the differential gray-scale value curve are determined. A gray-scale value of the overlapping region between the color filter and the black matrix is obtained. A threshold value is established. Two extremums of the differential gray-scale value curve which are the closest to the two intersections respectively are obtained, and then the edges of the overlapping region between the color filter and the black matrix are determined based on the two extremums.