Cell-Level LED Display Calibration for Uniform Color
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Solution Overview
Problem
Existing LED display devices suffer from color differences between modules due to calibration based on average RGB values, leading to inaccuracies in color perception.
Innovation Solution
Calibration is performed on a smaller unit called a 'cell', which is larger than a pixel and smaller than a module, using 128 or 144 cells as a basic unit, with size determined by camera resolution, lens angle, and screen area, to uniformly maintain color difference across the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If calibration is performed based on average RGB values of a module, then the calibration process is simple, but color difference between modules cannot be accurately detected
Solution Approach 1:
The patent divides the module into multiple cells (e.g., 16x8 or 16x9 grid) for calibration. Instead of treating the entire module as one unit, each cell is independently calibrated, allowing precise detection of color differences across different regions while maintaining operational simplicity through automated cell-based processing
2Area of stationary object
If calibration is performed based on module level, then the calibration scope is large, but color uniformity within the display device deteriorates
Solution Approach 1:
The display device is segmented into multiple cells within each module, and calibration is performed at the cell level rather than module level. This ensures that color uniformity is maintained across the entire display device by addressing local variations in each cell while still covering the full scope through systematic coverage of all cells
Solution Approach 2:
Each cell receives customized calibration parameters based on its specific color characteristics, allowing local optimization of color quality. This ensures that each region of the display device achieves optimal color uniformity while contributing to overall device consistency
Data Source
AI summary
A method for calibrating a LED display device, according to one embodiment of the present invention, comprises the steps of: providing one module composed of a plurality of pixels; providing a cabinet composed of a plurality of modules; providing an LED display device composed of a plurality of cabinets; and calibrating by cell unit, which is larger than the size of the pixel and is smaller than the size of one module.