Screen Parameter Measurement Using Multi-Exposure Brightness Mapping
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Solution Overview
Problem
Current methods for measuring brightness and chromaticity in electronic devices have relatively low accuracy.
Innovation Solution
A parameter measurement method and apparatus that involves obtaining target images of a screen under different preset exposure durations, determining target grayscale values, and using brightness-to-grayscale mapping strategies to obtain target brightness values, which are then used to determine display parameter measurement results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current brightness and chromaticity detection methods are used, then the measurement process is simple, but the measurement accuracy is low
Solution Approach 1:
The patent segments the measurement process into multiple exposure duration groups (first, second, third groups) with different exposure times. Each group captures images under specific brightness conditions, allowing accurate measurement across different luminance ranges. This segmentation enables the system to handle both bright and dark display areas with appropriate exposure settings, resolving the accuracy issue while maintaining manageable process complexity through structured organization.
Solution Approach 2:
The patent changes the exposure duration parameter across different image groups to optimize measurement accuracy for different brightness levels. By using short exposure for bright areas, medium exposure for intermediate areas, and long exposure for dark areas, the system adapts the measurement parameters to match the display content characteristics. This parameter variation enables accurate chromaticity and brightness detection without requiring complex hardware modifications.
2Measurement precision
If multiple exposure durations are used to improve measurement accuracy, then the measurement precision improves, but the measurement time increases
Solution Approach 1:
The patent applies partial action by selectively using only the necessary exposure duration groups based on the actual display content characteristics. The system determines which exposure group (first, second, or third) is most appropriate for the current measurement scenario and may use only that group or combine fewer groups than the maximum three. This approach achieves sufficient measurement accuracy without always requiring all three exposure durations, thereby reducing measurement time while maintaining precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the accuracy of display parameter measurement by obtaining multiple target brightness values through mapping strategies, allowing for precise detection of display issues and quantification of their severity.
Implementation Method 1
Through the imaging lens, the first optical filter, and the area array sensor, the target image of the screen under test is collected
Data Source
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AI summary
Provided are a parameter measurement method and apparatus, an electronic device, and a computer storage medium. The parameter measurement method comprises: determining target grayscale values of target images of a screen to be measured under different preset exposure durations, and acquiring brightness-grayscale mapping strategies corresponding to different preset exposure durations (S102); substituting the target gray scale values into the brightness-grayscale mapping strategies for mapping processing to obtain target brightness values corresponding to the target grayscale values (S103); and determining a display parameter measurement result of said screen according to the target brightness values (S 104). The method can improve the accuracy of the display parameter measurement result.