Display Compensation Data Generation for Mixed Color Luminance Uniformity
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Solution Overview
Problem
Display devices experience color deviation in mixed color images due to the loading effect, which is not accounted for when generating red, green, and blue compensation data, leading to luminance inconsistencies.
Innovation Solution
A method of generating compensation data for display devices that involves capturing white, first color, and third color loading luminances, calculating corresponding scale factors, and applying these scale factors to input image data to differentiate between single color and mixed color images, ensuring uniform luminance across all colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If red, green, and blue compensation data are generated respectively based on captured single color images, then luminance uniformity of single color images is improved, but color deviation occurs in mixed color images due to loading effect
Solution Approach 1:
The patent segments the compensation process into two distinct paths: one for single color images and another for mixed color images. By capturing loading luminances for each color channel separately and calculating color-specific scale factors, the system applies appropriate compensation strategies based on image type, thereby resolving the contradiction between luminance uniformity and color accuracy
Solution Approach 2:
The patent introduces color scale factors as adjustable parameters that modify the compensation values based on the loading effect characteristics of each color channel. By changing the compensation parameters dynamically according to whether the image is single-color or mixed-color, the system maintains both luminance uniformity and color accuracy
2Ease of manufacture
If compensation data is generated without considering loading effect, then generation process is simple, but color deviation occurs in mixed color images
Solution Approach 1:
The patent performs preliminary capture of loading luminances for white and each color channel before generating compensation data. By pre-measuring the loading effect characteristics and storing them for later use, the system maintains a relatively simple process while incorporating necessary corrections for color consistency
Solution Approach 2:
The patent introduces loading luminance measurements as intermediary data that bridges the simple compensation process and the need for color accuracy. These intermediary measurements capture the loading effect and enable subsequent calculation of color scale factors without fundamentally complicating the overall compensation workflow
Data Source
AI summary
In a method of generating compensation data for a display device, first color, second color, and third color compensation value sets may be obtained by capturing first color, second color, and third color images displayed by the display device, respectively, white, first color, second color, and third color loading luminances may be obtained by capturing white, first color, second color, and third color loading patterns displayed by the display device, respectively, first color, second color, and third color scale factors may be calculated by dividing a luminance decrease ratio of the white loading luminance by luminance decrease ratios of the first color, second color, and third color loading luminances, respectively, and the first color, second color, and third color compensation value sets and the first color, second color, and third color scale factors may be stored in the display device.