Display Module Seam Correction via Luminance Adjustment
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Solution Overview
Problem
Display panels configured with multiple LED modules can exhibit dark lines or emission lines due to assembly tolerance issues, affecting image quality.
Innovation Solution
A display apparatus that adjusts grayscale and luminance values of each display module using luminance correction coefficients, with a processor applying specific coefficients to target pixels adjacent to seam regions to compensate for luminance discrepancies and remove display abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple LED modules are assembled to form a display panel, then the display size and flexibility are improved, but assembly tolerance causes dark lines or emission lines to appear at seam regions
Solution Approach 1:
The patent applies different luminance correction coefficients to different regions of the display panel. Specifically, a second luminance correction coefficient is applied to target pixels adjacent to seam regions, while a first luminance correction coefficient is applied to other pixels. This local differentiation compensates for the luminance discrepancies caused by assembly tolerances at seam regions, thereby removing dark lines or emission lines while maintaining overall display uniformity.
2Manufacturing precision
If luminance correction coefficients are applied to compensate for seam regions, then display uniformity is improved, but image grayscale accuracy may be affected
Solution Approach 1:
The patent applies luminance correction selectively only to target pixels adjacent to seam regions rather than to the entire display panel. By limiting the correction action to specific areas where luminance discrepancies occur, the patent achieves the necessary luminance uniformity without excessively altering the grayscale accuracy of the entire image. This partial application of correction minimizes the impact on overall image quality.
3Manufacturing precision
If assembly tolerance is reduced to eliminate dark lines, then seam region uniformity is improved, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of reducing assembly tolerance through stricter manufacturing controls, the patent changes the luminance parameter of pixels adjacent to seam regions by applying specific luminance correction coefficients. This software-based parameter adjustment compensates for the physical assembly tolerances, achieving seam region uniformity without increasing manufacturing complexity or assembly precision requirements.
Data Source
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Figure 4b~4c
AI summary
A display apparatus is provided. The display apparatus includes: a display configured to include a plurality of display modules, a storage configured to store a first luminance correction coefficient corresponding to light-emitting pixels constituting each of the plurality of display modules and a second luminance correction coefficient corresponding to at least one target pixels adjacent to a seam region from among the light-emitting pixels, and a processor configured to apply the second luminance correction coefficient to the target pixel, apply the first luminance correction coefficient to remaining pixels, and drive the display, wherein the second luminance correction coefficient may be a luminance correction coefficient which is calculated based on a target luminance value to compensate the seam region.