Display Panel Blue Sub-Pixel Driving Method for Viewing Angle Color Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display technologies, such as VA mode and IPS mode, suffer from rapid brightness saturation and significant color shift at large viewing angles, particularly affecting blue sub-pixels, which degrades display quality and results in a blueish image due to uneven brightness distribution.
Innovation Solution
The method involves dividing display panel pixels into groups, calculating display hue and color purity using the CIE LCH color space, and employing a gray scale lookup table to determine high and low driving voltages for blue sub-pixels, ensuring center and side viewing angle brightness matching, thereby reducing color shift and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional VA mode or IPS mode liquid crystal display is used, then large viewing angle is achieved, but brightness saturation occurs quickly and color shift becomes serious
Solution Approach 1:
The patent applies local quality by differentiating the driving voltages for different color sub-pixels (red, green, blue) based on their individual characteristics. Specifically, different gray scale voltage sets are applied to red, green, and blue sub-pixels to compensate for their different luminance saturation behaviors, thereby maintaining uniform brightness across all colors at large viewing angles without causing color shift.
2Illumination intensity
If driving voltage is increased to maintain brightness, then center view angle brightness is improved, but side viewing angle brightness becomes uneven and color shift increases
Solution Approach 1:
The patent changes the electrical parameters (driving voltages) for different color sub-pixels to compensate for viewing angle effects. By adjusting the gray scale voltages applied to red, green, and blue sub-pixels independently, the patent maintains consistent luminance characteristics across different viewing angles, preventing both brightness saturation and color shift.
3Adaptability or versatility
If blue sub-pixel brightness is increased to match other colors, then color balance is improved, but brightness saturation occurs more quickly
Solution Approach 1:
The patent applies local quality by recognizing that blue sub-pixels have different luminance characteristics compared to red and green sub-pixels. Instead of uniformly increasing voltage across all colors, the patent applies specific adjusted voltage sets to blue sub-pixels that account for their faster saturation behavior, thereby achieving color balance without inducing premature brightness saturation.
Data Source
AI summary
A driving method of a display panel is provided. A driving method of a display panel including: dividing a plurality of pixels disposed on the display panel into a plurality of pixel groups, each of the pixel groups including even number pixels arranged in matrix; calculating a display hue of each of the pixel groups according to an image input signal; obtaining a gray scale lookup table according to a hue range containing the display hue, a gray scale value of each blue sub-pixel corresponding to two pair of target gray scale values in the gray scale lookup table; obtaining the two pair of the target gray scale values in the gray scale lookup table according to an average gray scale value of blue sub-pixel of each of the pixel groups; obtaining two pair of corresponding driving voltages according to the two pair of the target gray scale values of each of the pixel groups; and driving the blue sub-pixel of the corresponding pixel group according to the two pair of corresponding driving voltages.