WOLED Color Complementation via Iterative Chromaticity Refinement
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Solution Overview
Problem
WOLED display devices face deviations in chromaticity coordinates of white light emission, requiring sub-pixel units to compensate and achieve accurate color complementation, which existing methods struggle to achieve with high accuracy and efficiency.
Innovation Solution
A method involving iterative calculations of chromaticity coordinates and complementary color ratios among R, G, B, and W sub-pixel units to determine and adjust brightness levels, ensuring accurate color complementation by iteratively refining chromaticity coordinates and ratios until the desired white brightness is reached, and implementing these adjustments in a display device with a driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If iterative calculations of chromaticity coordinates and complementary color ratios are performed to improve color accuracy, then color complementation accuracy is improved, but calculation time and processing complexity increase
Solution Approach 1:
The patent pre-calculates and stores chromaticity coordinates and complementary color ratios for various brightness levels before actual display operation. This preliminary computation allows the display device to quickly retrieve and apply pre-computed values during runtime, avoiding real-time iterative calculations while maintaining high color accuracy.
Solution Approach 2:
The patent implements a dynamic lookup table that adapts to different brightness conditions. The system selects appropriate pre-computed chromaticity coordinates and complementary color ratios based on the current brightness level, enabling efficient real-time color correction without performing full iterative calculations for each display frame.
2Manufacturing precision
If multiple sub-pixel units are adjusted to achieve color complementation, then color accuracy is improved, but device control complexity increases
Solution Approach 1:
The patent employs a universal lookup table structure that serves multiple functions: storing chromaticity coordinates, complementary color ratios, and brightness compensation data. This single data structure handles all color correction operations for different brightness levels, simplifying the control circuit while maintaining comprehensive color accuracy across the entire brightness range.
Solution Approach 2:
The patent introduces a lookup table as an intermediary between the display control system and the sub-pixel units. This intermediary pre-processes and organizes complex color correction data, allowing the control circuit to simply retrieve and apply values from the lookup table rather than performing complex real-time calculations, thus reducing control complexity while maintaining precision.
Data Source
AI summary
Disclosed are a method for color complementation on a white organic light emitting diode (WOLED) display device, and a display device. The method comprises: (a) acquiring respective first chromaticity coordinates of each of red (R), green (G), blue (B), and white (W) sub-pixel units for a brightness outputted by the WOLED display device; (b) calculating a first complementary color ratio among the R, G, B, and W sub-pixel units; (c) determining a desired brightness of the W sub-pixel unit, and obtaining respective first complementary color brightnesses of each of the R, G, B, and W sub-pixel units, and in turn determining respective second chromaticity coordinates of each of the R, G, B, and W sub-pixel units corresponding to the respective first complementary color brightness of each of the R, G, B, W sub-pixel units; and (d) implementing in iterations steps (a), (b) and (c), so as to obtain a second complementary color ratio among the R, G, B, W sub-pixel units corresponding to the desired brightness of the W sub-pixel unit. Color complementation of the WOLED display device is carried out depending on the second complementary color ratio among the R, G, B, and W sub-pixel units when the brightness outputted by the WOLED display device reaches the desired brightness of W sub-pixel unit.