Display Device Correction Data Error Diffusion and Bit Reduction
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Solution Overview
Problem
In organic EL display devices, increasing display panel resolution leads to a significant increase in correction data volume and transfer rate requirements, straining memory capacity and data transfer efficiency, particularly in miniaturized and high-definition devices like tablet terminals.
Innovation Solution
A method that transforms first correction data into second correction data by propagating error components to surrounding pixels and performing bit reduction, reducing the data volume while maintaining correction accuracy, thereby reducing memory capacity and data transfer rate demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display panel resolution is increased to achieve high-definition display, then display quality is improved, but correction data volume and transfer rate requirements increase significantly, straining memory capacity and data transfer efficiency
Solution Approach 1:
The correction data is segmented into multiple precision levels: first correction data with first precision for all pixels, and second correction data with second precision (lower than first precision) for specific pixels. This segmentation allows the system to maintain high display quality while reducing overall correction data volume by applying full-precision correction only where necessary.
Solution Approach 2:
Different precision levels of correction data are applied to different regions or types of pixels based on their specific characteristics. Pixels with larger luminance differences or higher importance receive first-precision correction data, while other pixels use second-precision correction data. This local quality approach ensures correction accuracy is maintained where needed while reducing overall data volume.
2Measurement precision
If correction data precision is increased to maintain correction accuracy, then luminance correction accuracy is improved, but correction data volume increases, straining memory capacity and data transfer rate
Solution Approach 1:
Correction data is divided into two precision levels stored in separate memory regions: first correction data with higher precision for pixels requiring accurate correction, and second correction data with lower precision for other pixels. This segmentation enables the system to maintain correction accuracy for critical pixels while reducing overall data volume through selective precision application.
Solution Approach 2:
Different precision levels are assigned to different pixels based on their individual characteristics such as luminance difference magnitude. Pixels with significant luminance variations receive high-precision correction data, while pixels with minor variations use low-precision correction data. This ensures that correction accuracy is optimized locally where needed without unnecessarily increasing overall data volume.
Data Source
AI summary
A method of correcting a display device, including pixels that are arranged in a matrix and have light-emitting elements that emit light according to a luminance signal, is provided. The method includes obtaining in advance first correction data, which includes correction data components each corresponding to a different one of the pixels and is for correcting the luminance signal. The method also includes transforming the first correction data into second correction data, by (i) reconfiguring the correction data components by propagating an error component of each of the correction data components to surrounding pixels of a corresponding one of the pixels, and (ii) performing bit reduction on the correction data components that have been reconfigured. The method further includes correcting the luminance signal using the second correction data.