LCD Panel Capacitor Layout for Crosstalk and Afterimage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display panels suffer from display crosstalk and afterimage due to differences in the ratio of capacitors between the pixel electrode and the gate electrode of different emitting color pixels, leading to inconsistent optimal common voltages.
Innovation Solution
The liquid crystal display panel design includes a first capacitor less than a second capacitor for one sub-pixel and a second capacitor greater than the second capacitor for another sub-pixel, with adjusted areas and thicknesses of the drain and gate electrodes, and color resist layers to equalize the ratios of these capacitors, ensuring similar optimal common voltages across sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the cell gap of blue pixel is made less than that of red and green pixels to correct color deviation, then color balance is improved, but display crosstalk and afterimage increase
Solution Approach 1:
The patent applies different color resist thicknesses to different sub-pixels (blue sub-pixel has greater thickness than red and green sub-pixels) to locally adjust the cell gap for each color, correcting color balance while maintaining consistent optimal common voltage across all sub-pixels
Solution Approach 2:
The patent changes the thickness parameter of the color resist layer for different sub-pixels to adjust the cell gap, transforming the physical dimension parameter to achieve both color balance correction and consistent capacitor ratios
2Device complexity
If Trigate technology is used to reduce the number of chips on the film, then manufacturing complexity is reduced, but the capacitor ratio between pixel electrode and gate electrode becomes inconsistent across different colors, causing display crosstalk and afterimage
Solution Approach 1:
The patent introduces local variations in color resist thickness for different sub-pixels within the Trigate structure, making each sub-pixel have tailored capacitor ratios while maintaining the overall Trigate architecture's manufacturing simplicity
Solution Approach 2:
The patent adjusts the thickness parameter of the color resist layer to change the capacitor ratio, transforming the physical dimension to achieve consistent optimal common voltages across different colors while preserving the Trigate technology's benefits
Data Source
AI summary
The present application provides a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel makes the second capacitor of the first sub-pixel greater than the second capacitor of the second sub-pixel and connects a drain electrode to a pixel electrode such that a ratio of the first capacitor of the first sub-pixel in a capacitor formed by and connected to the pixel electrode is similar to or even the same as a ratio of the first capacitor of the second sub-pixel in the capacitor formed by and connected to the pixel electrode, which avoids issues of display crosstalk and afterimage.