WOLED Display Control for Chromatic Aberration Compensation
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Solution Overview
Problem
White OLED display devices with RGBW mode suffer from chromatic aberration when converting RGB data to RGBW data, leading to adverse image quality due to non-standard pure white light emission from the WOLED, which affects display brightness and power consumption.
Innovation Solution
A display control method and device that determines chromaticity coordinates and brightness values for WOLEDs to compensate for chromatic aberration by using a chromaticity coordinate table and color-mixing equations, adjusting subpixel gain values and white data to achieve pure white light emission, thereby improving image quality and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If RGB data is converted into RGBW data by replacing some light from RGB subpixels with white light, then power consumption is reduced and brightness is increased, but chromatic aberration occurs and image quality is adversely affected
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the chromaticity coordinates of the WOLED based on the driving voltage and material characteristics. The control device calculates corrected chromaticity coordinates using formulas that account for the voltage-dependent color shift, thereby compensating for chromatic aberration while maintaining the benefits of RGBW conversion for reduced power consumption and improved brightness.
2Illumination intensity
If the WOLED emits white light through combination of light-emitting layers in multiple colors, then brightness is improved, but the color of the light changes depending on driving voltage resulting in non-standard pure white light
Solution Approach 1:
The patent implements feedback by continuously monitoring the driving voltage of the WOLED and using this information to calculate and adjust the chromaticity coordinates. The control device references standard chromaticity values and dynamically corrects the emitted light's color characteristics based on the actual voltage conditions, ensuring consistent pure white light output across different brightness levels.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively compensates for chromatic aberration in WOLEDs, enhancing display quality by ensuring pure white light emission and optimizing power usage in WOLED display devices.
Implementation Method 1
each subpixel includes a WOLED which emits the white light through a combination of light-emitting layers in multiple colors
Data Source
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AI summary
The present disclosure provides a white organic light-emitting diode (WOLED) display device, its display control method, and a display control device. The method includes: receiving red (R), green (G) and blue (B) source data, and determining a minimum value of the R, G and B source data; determining white (W) data in accordance with the minimum value; determining chromaticity coordinates of a WOLED in accordance with the W data; acquiring a brightness value of the WOLED desired for compensating for the chromaticity coordinates of the WOLED to a target value, and a gain value of a subpixel participating in chromatic aberration compensation; and determining output values of R, G, B and W data in accordance with the brightness value of the WOLED, the gain value of the subpixel participating in the chromatic aberration compensation and the W data.