WOLED Color Complementation via Multi-Level Sub-Pixel Calibration
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Solution Overview
Problem
Conventional color complementation methods for WOLED display devices are inaccurate, affecting the display effect due to discrepancies between actual and target chromaticity coordinates of white light, requiring compensation from red, blue, and white sub-pixels.
Innovation Solution
A method that determines target output brightnesses, measures and adjusts sub-pixel brightnesses to achieve preset chromaticity coordinates, obtaining correlations between output and color complementation brightnesses to perform accurate color complementation, including calculating initial ratios and adjusting sub-pixel brightnesses accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional color complementation methods are used to compensate for chromaticity coordinate discrepancies, then color accuracy is improved, but the method is inaccurate and affects display effect
Solution Approach 1:
The patent changes the parameter measurement approach by measuring chromaticity coordinates and brightness at multiple different brightness levels (at least two target output brightnesses) rather than a single level. This multi-level parameter measurement and correlation building resolves the inaccuracy of conventional single-point calibration methods, enabling more reliable color complementation across the entire brightness range of the display device.
2Manufacturing precision
If multiple sub-pixels (R, B, W) are used together for color complementation, then chromaticity coordinate accuracy is improved, but the complexity of brightness adjustment increases
Solution Approach 1:
The patent implements a feedback mechanism where chromaticity coordinates are measured at multiple brightness levels, correlations are built between output brightness and color complementation brightness, and these correlations are then used to automatically determine the appropriate brightness adjustments for R, B, and W sub-pixels. This closed-loop feedback approach simplifies the adjustment process compared to manual trial-and-error methods while maintaining high chromaticity coordinate accuracy.
3Productivity
If color complementation is performed using calculated ratios, then adjustment speed is improved, but accuracy may be compromised without proper calibration data
Solution Approach 1:
The patent performs preliminary calibration by measuring chromaticity coordinates and brightness at multiple target output brightness levels before actual operation. These measurements are used to build correlation data that stores the relationship between output brightness and color complementation brightness. During actual display operation, this pre-built correlation data enables rapid and accurate color complementation adjustments without requiring real-time complex calculations, thus achieving both speed and accuracy.
Data Source
AI summary
A color complementation method for a WOLED display device includes: determining at least two target output brightnesses; measuring and adjusting the WOLED display device by using the at least two target output brightnesses, respectively, to obtain data to be used; wherein the measuring and adjusting includes: allowing an output brightnesses of the WOLED display device to be same as each of the target output brightnesses, and adjusting output brightnesses of sub-pixels and obtaining the output brightnesses of the sub-pixels at a preset chromaticity coordinate as color complementation brightnesses of the sub-pixels; generating, according to the data to be used, correlations between the output brightnesses of the WOLED display device and the color complementation brightnesses of the sub-pixels; according to the correlations, performing color complementation of the WOLED display device.