Display Screen Abnormal Color Correction via Wavelength Filtering
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Solution Overview
Problem
In liquid crystal display devices, the phenomenon of blue grayscale voltages leading to a bluish color in white image levels is common, and reducing blue light to address this issue results in reduced transmittance, posing a challenge in balancing blue light reduction with maintaining transmittance.
Innovation Solution
A method and device that detect abnormal brightness areas, determine if the abnormal color is blue, and absorb wavelength energy below a predetermined threshold in the transmittance cut-off wavelength sequence to eliminate the abnormal color, thereby increasing chromaticity information and reducing blue light proportion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blue grayscale voltages are reduced to reduce blue light proportion, then the bluish color is improved, but the transmittance is reduced
Solution Approach 1:
The patent segments the wavelength spectrum into different ranges and applies different transmittance cut-off characteristics to each segment. By dividing the blue light range into multiple wavelength bands and selectively cutting off specific segments rather than uniformly reducing all blue light, the invention achieves color correction while preserving overall transmittance. This is implemented through the wavelength sequence generation module that creates cut-off wavelengths at different positions for different wavelength ranges.
Solution Approach 2:
The patent applies local quality by creating non-uniform transmittance characteristics across different wavelength regions. Instead of applying a uniform voltage reduction across all blue grayscale levels, the invention selectively adjusts transmittance at specific wavelength positions within the blue range based on the detected abnormal color characteristics. This allows targeted correction of the bluish tint while maintaining transmittance in other wavelength regions.
2Manufacturing precision
If blue grayscale voltages are reduced to correct color points, then the yellow color balance is improved, but the display brightness is reduced
Solution Approach 1:
The patent implements dynamic adjustment of transmittance cut-off wavelengths based on real-time detection of abnormal brightness areas and their color characteristics. The wavelength sequence generation module dynamically creates customized cut-off sequences according to the detected abnormal color, allowing the system to adaptively correct color points while maintaining optimal brightness. This dynamic approach replaces static voltage reduction with flexible, context-dependent wavelength filtering.
Solution Approach 2:
The patent changes the parameter of transmittance cut-off wavelength positions to achieve color correction. By adjusting which specific wavelength positions are cut off (rather than uniformly reducing all blue light), the invention modifies the spectral composition to correct color points while preserving overall light intensity. This parameter change approach allows independent control of color balance and brightness.
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
This approach effectively eliminates the bluish color while minimizing the reduction in transmittance, achieving the goal of reducing blue light proportion without compromising display screen brightness.
Implementation Method 1
eliminating, by absorbing wavelength energy whose wavelength is less than a predetermined wavelength threshold in the transmittance cut-off wavelength sequence, the abnormal color area in the display screen
Data Source
AI summary
A method of adjusting a display screen, an adjusting device for a display screen, a display device, and a storage medium are provided. The method includes obtaining brightness information in an abnormal brightness area in response to detecting that the abnormal brightness area is in a current display screen, obtaining a corresponding transmittance cut-off wavelength sequence in an abnormal color area in the abnormal brightness area in response to determining that the abnormal color in the abnormal brightness area is blue, and eliminating the abnormal color area in the display screen by absorbing wavelength energy whose wavelength is less than a predetermined wavelength threshold in the transmittance cut-off wavelength sequence.