LED Panel Seam Calibration via Pixel Grayscale Adjustment
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Solution Overview
Problem
When multiple LED panels are assembled to form a large display device, maintaining uniform spacing between panels is challenging, leading to issues like bright or dark lines and nonuniform luminance around the seams, which affects the visual quality of the display.
Innovation Solution
A calibrating device with a processor and memory that analyzes images of the seam between panels, compares characteristic data to generate comparison results, and adjusts the grayscale data of adjacent pixels to adjust luminance and chromaticity, using a modified luminance-chromaticity calibration matrix to eliminate nonuniform luminance phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple LED panels are assembled to form a large display device, then the display area is increased, but nonuniform luminance and bright/dark lines occur at the seams between panels
Solution Approach 1:
The patent applies local quality by differentiating the treatment of pixels based on their location. Pixels adjacent to seams receive special grayscale adjustment through a modified calibration matrix, while other pixels use standard calibration. This localized approach targets the specific problem area (seam regions) without affecting the entire display, thereby maintaining luminance uniformity across the expanded display area.
2Ease of manufacture
If panels are disposed together to form large display, then cost is reduced, but spacing uniformity between panels becomes difficult to maintain
Solution Approach 1:
The patent changes the grayscale parameter of pixels adjacent to seams based on the actual spacing conditions. By modifying the calibration matrix to account for spacing variations, the system compensates for non-uniform panel spacing without requiring precise mechanical alignment, thus maintaining cost-effectiveness while achieving visual uniformity.
3Manufacturing precision
If grayscale data of pixels adjacent to seam is adjusted, then luminance uniformity is improved, but calibration complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-calculating the modified luminance-chromaticity calibration matrix that incorporates seam compensation. This matrix is generated in advance and stored for direct application during operation, eliminating the need for complex real-time calculations and reducing calibration complexity while achieving luminance uniformity.
Data Source
AI summary
A calibrating device includes a memory and a processor. The memory is configured to store at least one computer readable instruction. The processor is electrically coupled to the memory, and configured to access and execute the at least one computer readable instruction to: analyze an image of a target region which a seam between two LED panels disposed side by side is in, to obtain characteristic data associated with the seam; compare the characteristic data associated with the seam with a predetermined value to generate a comparison result; and adjust grayscale data of pixels which are arranged in two lines of the two LED panels and adjacent to the seam, based on the comparison result, for adjusting luminance-chromaticity of the pixels, wherein the two lines are in a first direction or a second direction, and the first direction is perpendicular to the second direction.