OLED Color Gamut Calibration via Brightness-Dependent RGB Correction
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Solution Overview
Problem
Current color gamut calibration methods for OLED display screens are inadequate as they only account for a single brightness level, leading to hue deviations and suboptimal display effects when brightness changes, failing to ensure accurate color representation across varying display conditions.
Innovation Solution
A method and device for calibrating the color gamut of OLED display screens by determining corrected color coordinates based on brightness levels and original RGB values, using brightness compensation values to unify color coordinates across different brightness levels, ensuring accurate color representation and optimal display effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If color gamut calibration is performed using a single brightness level, then the calibration process is simple, but hue deviations occur when brightness changes
Solution Approach 1:
The patent implements dynamic color gamut calibration by establishing multiple calibration datasets corresponding to different brightness levels. The system dynamically selects and applies the appropriate calibration dataset based on the current brightness level of the display screen, thereby maintaining color accuracy across varying brightness conditions without requiring a overly complex single-dataset calibration process.
Solution Approach 2:
The patent changes the calibration parameter from a single fixed brightness level to multiple brightness levels. By acquiring color gamut data at different brightness levels and creating corresponding calibration datasets, the system resolves the contradiction between calibration simplicity and color accuracy under varying brightness conditions.
2Reliability
If multiple brightness levels are used for calibration, then color accuracy under varying brightness is improved, but calibration complexity increases
Solution Approach 1:
The patent segments the calibration process into multiple independent calibration datasets, each corresponding to a specific brightness level. This segmentation allows the system to maintain color accuracy for each brightness level individually while providing a structured, manageable approach to multi-level calibration, reducing the perceived complexity compared to a monolithic calibration system.
Solution Approach 2:
The patent performs preliminary calibration at multiple brightness levels during the manufacturing or setup phase, storing the results as pre-computed calibration datasets. This preliminary action eliminates the need for complex real-time calculations during operation, as the system only needs to retrieve and apply the appropriate pre-calculated dataset based on current brightness conditions.
3Measurement precision
If brightness compensation values are calculated for each dimension, then color coordinate precision is improved, but computational complexity increases
Solution Approach 1:
The patent applies local quality by calculating brightness compensation values specifically for each dimension (x, y, z coordinates) of the color space independently. This targeted approach improves color coordinate precision in each dimension without requiring full recalculation of the entire color space, thereby reducing computational complexity while maintaining high precision where it matters most.
Data Source
AI summary
A method for calibrating a color gamut of a display screen includes: acquiring a brightness level of the display screen, and original red green blue (RGB) values of a color to be displayed by a pixel in the display screen; determining, according to the brightness level of the display screen and the original RGB values, corrected color coordinates; and determining a calibrated RGB values according to the corrected color coordinates, and driving, with the calibrated RGB values, light emission of the pixel in the display screen.