Frequency Domain Correction Data Compression for OLED Luminance Uniformity
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Solution Overview
Problem
High-resolution organic EL display devices face challenges in managing luminance unevenness due to the large volume of correction data required for accurate luminance correction, particularly in miniaturized and high-definition devices like tablet terminals, where memory capacity is limited.
Innovation Solution
The method involves transforming initial correction data into reduced-frequency second correction data by decomposing frequency components and removing specific frequency components, allowing for efficient storage and use of correction data in the display device, thereby reducing data volume while maintaining accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution display is implemented, then display quality is improved, but correction data volume becomes enormous
Solution Approach 1:
The correction data is segmented into multiple frequency components through Fourier transform. By dividing the correction data into different frequency bands (low-frequency components representing gradual luminance variations and high-frequency components representing rapid variations), the patent enables selective retention of only necessary components, thereby reducing overall data volume while maintaining correction effectiveness for high-resolution displays
Solution Approach 2:
The patent extracts and removes high-frequency components from the correction data, retaining only low-frequency components. This extraction process eliminates redundant information that contributes minimally to luminance correction accuracy, significantly reducing the volume of correction data that needs to be stored and processed in high-resolution displays
2Reliability
If accurate luminance correction is achieved, then luminance uniformity is improved, but memory capacity requirements increase
Solution Approach 1:
The patent changes the parameter representation of correction data from spatial domain to frequency domain through Fourier transform. This parameter transformation allows the system to represent the same correction information using fewer parameters (low-frequency components) rather than requiring full-resolution correction data for each pixel, thereby reducing memory capacity requirements while preserving luminance correction accuracy
Data Source
AI summary
A display device correction method is provided for correcting luminance unevenness in a display device including pixels, which are arranged in a matrix and include light-emitting elements that emit light according to a luminance signal. 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 decomposing the correction data components included in the first correction data into frequency components, and removing a predetermined frequency component among the frequency components. The method further includes correcting the luminance signal using the second correction data.