Multi-Module LED Display Local Dimming Brightness Consistency
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Solution Overview
Problem
Large-sized LED display devices struggle to provide a smooth screen experience due to inconsistent brightness across multiple display modules, as each module determines local dimming values based on the entirety of image data without considering individual luminance levels.
Innovation Solution
A display apparatus comprising multiple modules with receivers, controllers, and transmitters that calculate and apply local dimming values based on received image data, allowing for dynamic adjustment of brightness in each module to match a preset reference value, ensuring consistent luminance across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each display module determines local dimming value based on the entirety of image data, then the local dimming function can be implemented, but the brightness consistency across multiple modules deteriorates
Solution Approach 1:
The patent segments the image data processing by dividing the overall image into multiple regions corresponding to each display module. Each module processes only its designated region's luminance characteristics to determine local dimming values, rather than processing the entire image. This segmentation enables each module to independently optimize its brightness while maintaining consistency across the entire display wall.
2Area of stationary object
If multiple LED modules are arranged in M×N matrix form to expand display size, then the display area increases, but the screen smoothness deteriorates
Solution Approach 1:
The patent applies local quality by allowing each display module to have independent luminance control based on its specific region's image characteristics. Each module calculates its own local dimming values according to the luminance distribution in its corresponding image region, enabling localized brightness optimization. This ensures that each module adapts to its specific content requirements while maintaining overall screen smoothness across the expanded M×N display area.
Data Source
AI summary
Provided are a display apparatus and a controlling method thereof for implementing a local dimming function. A display apparatus including a plurality of display modules includes: a receiver configured to receive image data; a controller configured to calculate a local dimming value based on the received image data, and extract the image data corresponding to the display module from the image data to which the local dimming value is applied; and an output configured to output the extracted image data to be displayed.