Pixel Driving Method for LCD Color Washout and Visual Mesh
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Solution Overview
Problem
Wide-view LCD panels experience color washout and luminance differences when viewed from different angles, leading to a visual mesh of color-block images due to the optical properties of liquid crystals and the use of sub-pixels with different Gamma curve output features.
Innovation Solution
A driving method for pixels that sets output gray values based on saturation, adjusting the difference between output gray values of sub-pixels to minimize color differences and reduce the wide-view color washout phenomenon, by using specific value ranges to control the adjustment ratios for MSM and SMS pixel arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If space domain compensation technology is used to differentiate Gamma curve output features of sub-pixels, then color washout phenomenon is effectively alleviated, but color levels and luminance levels of sub-pixels become different, causing color difference between pixels and visual mesh
Solution Approach 1:
The patent applies dynamics by making the Gamma curve adjustment dynamic based on saturation levels. Different Gamma curves are selected according to the saturation of the input signal, allowing the system to adaptively adjust color output. This resolves the contradiction by enabling different Gamma curve output features for sub-pixels (alleviating color washout) while controlling the adjustment magnitude to maintain color level consistency and avoid visual mesh.
Solution Approach 2:
The patent changes the parameter of Gamma curve characteristics based on saturation levels. By adjusting the Gamma curve parameters dynamically according to saturation ranges, the system can differentiate output features for wide-view display while controlling color differences. This parameter change approach allows optimization of both color washout reduction and color consistency.
2Adaptability or versatility
If multi-domain liquid crystal molecules are divided into different alignment domains, then wide view display effect is achieved, but color distortion and luminance level difference occur when viewed from exceeding visual angles
Solution Approach 1:
The patent applies local quality by treating different sub-pixels (MSM and SMS types) with different Gamma curve characteristics. Each sub-pixel type receives customized Gamma adjustment based on its specific optical properties and viewing angle characteristics. This localized approach allows wide-view display while minimizing color distortion and luminance differences at oblique viewing angles.
Solution Approach 2:
The patent changes Gamma curve parameters according to saturation levels to compensate for the optical limitations of multi-domain liquid crystal display. By adjusting parameters dynamically, the system maintains color accuracy and luminance consistency across different viewing angles, resolving the contradiction between wide-view capability and color distortion.
3Adaptability or versatility
If sub-pixels are used to solve color washout, then wide view is improved, but visual mesh of uniform color-block image is generated due to different color levels
Solution Approach 1:
The patent uses dynamics by adaptively selecting Gamma curves based on saturation levels. This dynamic adjustment ensures that color differences between sub-pixels are controlled within acceptable ranges, maintaining uniform appearance in color-block images while preserving wide-view capabilities.
Solution Approach 2:
The patent implements feedback by using saturation information to determine the appropriate Gamma curve. The saturation level serves as a feedback parameter that guides the Gamma curve selection, ensuring consistent color output across sub-pixels while maintaining wide-view display quality.
Data Source
AI summary
A driving method for pixel is configured to drive a first pixel and a second pixel. The driving method includes that a first output gray value of the first pixel and a second output gray value of the second pixel are set according to saturation. The saturation is decided according to an input gray value. The first pixel and second pixel are driven according to the first output gray value and the second output gray value. When the saturation is within a first value range or a third value range, the difference between the first output gray value and the second output gray value is less than the difference between the first output gray value and the second output gray value, when the saturation is within a second value range. The second value range is between the first value range and the third value range.