Liquid Crystal Display Blue Pixel Voltage Adjustment
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Solution Overview
Problem
Liquid crystal displays using reactive mesogen (RM) alignment layers suffer from yellowish side illumination, particularly at high gray levels, which affects image quality and visibility.
Innovation Solution
A liquid crystal display system that adjusts the data voltage applied to blue pixels during specific periods, maintaining original voltages for red and green pixels, to prevent yellowish side illumination by controlling the electric field and liquid crystal molecule alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reactive mesogen (RM) alignment layer is used to increase transmittance, then transmittance is improved, but yellowish side illumination occurs at high gray levels
Solution Approach 1:
The patent adjusts the maximum gray level voltage parameter for blue pixels specifically. By lowering the maximum gray level voltage applied to blue pixels during periods when blue luminance ratio changes significantly, the liquid crystal alignment and optical properties are optimized to prevent yellowish side illumination while preserving the high transmittance benefit of the RM alignment layer.
2Object-affected harmful factors
If the maximum gray level voltage is reduced for blue pixels, then yellowish side illumination is prevented, but the luminance range for blue pixels is reduced
Solution Approach 1:
The patent applies different voltage adjustment strategies at different time periods. The maximum gray level voltage for blue pixels is reduced only during specific periods when the blue luminance ratio changes significantly, while maintaining normal voltage levels during other periods. This periodic selective adjustment prevents yellowish side illumination during critical transitions while preserving full luminance range during stable states.
Solution Approach 2:
The patent implements dynamic voltage adjustment based on real-time luminance ratio changes. The maximum gray level voltage for blue pixels is adjusted dynamically according to the rate of change of blue luminance ratio, making the system adaptable to different display conditions and content types to optimize both color accuracy and luminance range.
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 solution effectively reduces yellowish side illumination, enhancing image quality and side visibility by optimizing the data voltage adjustments for blue pixels within the RM alignment layer-based liquid crystal display.
Implementation Method 1
The liquid crystal display generates an electric field by applying a voltage to the electrodes to realign liquid crystal molecules of the liquid crystal layer and thus controls transmittance of light so as to display images
Implementation Method 2
The liquid crystal display generates an electric field by applying a voltage to the electrodes
Implementation Method 3
The liquid crystal display using the RM alignment layer has an effect of increasing transmittance as compared with an existing liquid crystal display due to low anchoring energy of the RM alignment layer
Data Source
AI summary
Provided is a liquid crystal display including: a liquid crystal panel assembly including a plurality of pixels; a data driver applying data voltages to a plurality of data lines connected to the plurality of pixels; and a signal controller generating image data signals to provide the generated image data signals to the data driver, in which the plurality of pixels includes a reactive mesogen (RM) alignment layer formed on a display panel, and the signal controller generates the image data signals by adjusting the data voltage with the maximum gray applied to the blue pixel to be decreased by a predetermined level.