Luminance Correction System for Display Uniformity
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Solution Overview
Problem
Display devices face challenges in providing uniform image quality due to luminance variations among pixels, which existing methods struggle to address effectively.
Innovation Solution
A luminance correction system that captures high-frequency and low-frequency images from a display device, using image separators and correctors to generate determination information for correcting luminance variations and spots, thereby producing uniform luminance images while reducing memory usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If luminance correction is performed by measuring luminance of each pixel, then uniform image quality is improved, but measurement time and processing complexity increase
Solution Approach 1:
The patent segments the luminance correction process into two distinct stages: a measurement stage where luminance data is collected from the display panel, and a correction stage where the collected data is processed and applied. This segmentation allows the time-consuming measurement to be performed once, while the correction can be rapidly applied to multiple images, thereby reducing overall processing time while maintaining luminance uniformity.
Solution Approach 2:
The patent performs preliminary luminance measurement and creates a correction map before actual image display. The measured luminance data from each pixel is processed to generate correction values that are stored and subsequently applied to images. This preliminary action eliminates the need for repeated measurements, significantly reducing measurement time while ensuring consistent luminance uniformity across displays.
2Manufacturing precision
If correction data is stored for each grayscale value, then correction accuracy is improved, but memory size increases
Solution Approach 1:
The patent applies parameter changes by using correction data derived from one grayscale value to correct images at different grayscale values. Instead of storing separate correction data for each grayscale level, the system adjusts the correction parameters based on the target grayscale value, maintaining correction accuracy while significantly reducing the memory required to store correction data.
Solution Approach 2:
The patent creates a universal correction approach where a single set of correction data can be applied across multiple grayscale values. The correction map generated from measurements is designed to be adaptable to different grayscale levels through parameter adjustment, making the correction system multi-functional and reducing the need for separate correction data for each grayscale value, thereby reducing memory requirements.
Data Source
AI summary
A luminance correction system includes: a display device that displays an image of a first grayscale value; an image capturing device that generates a first image and a second image by capturing the displayed image; and an image separator that generates a first high-frequency image by extracting a high-frequency image from the first image, and generates a second low-frequency image by extracting a low-frequency image from the second image, wherein the display device includes: an image corrector that generates a corrected image data by analyzing the first high-frequency image and the second low-frequency image to provide an analyzation result and by correcting an image data with respect to the displayed image in accordance with the analyzation result to generate the corrected image data; and a display unit including a plurality of pixels that emit light with luminance corresponding to the corrected image data.