Segmented Transparent Electrode for IPS Display Leakage and Contrast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid-crystal display devices, particularly those using the in-plane switching (IPS) mode, suffer from low transparency, low contrast, color shift, and flickering issues, which affect their performance and viewing experience.
Innovation Solution
The display device incorporates a specific design with a gate line, data lines, passivation layers, and pixel electrodes arranged in a manner that reduces photo current leakage and enhances performance, including a fringe field switching (FFS) mode with a transparent electrode having multiple finger portions, optimized opening widths, and positional relationships to improve transmittance, contrast, and aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in-plane switching (IPS) mode is used to improve viewing angle, then viewing angle is improved, but transparency, contrast, and flickering performance deteriorate
Solution Approach 1:
The patent divides the transparent electrode into multiple finger portions (first, second, third finger portions) with different orientations. This segmentation allows each finger portion to independently control liquid crystal molecules in specific regions, achieving both wide viewing angle and high contrast by optimizing light control in different directions simultaneously
Solution Approach 2:
Different finger portions are designed with specific orientations to address local viewing requirements. The first finger portion extends in a first direction to control one viewing zone, while the second finger portion extends in a second direction to control another viewing zone, providing locally optimized quality for transparency and contrast in different regions
2Device complexity
If conventional electrode design is used, then device complexity is low, but photo current leakage increases and performance deteriorates
Solution Approach 1:
The transparent electrode is segmented into multiple finger portions with specific orientations and spacing. This segmentation creates controlled regions that guide liquid crystal alignment while preventing unwanted photo current leakage paths, achieving performance improvement without excessive complexity
Solution Approach 2:
The finger portions act as intermediaries between the common electrode and the liquid crystal layer, creating controlled electric field paths that prevent direct photo current leakage while maintaining effective liquid crystal control for display performance
3Quantity of substance
If aperture ratio is increased to improve transmittance, then transmittance is improved, but contrast ratio and viewing angle performance deteriorate
Solution Approach 1:
The finger portions are designed with specific widths and spacing to optimize local light control. By adjusting the dimensions and orientation of each finger portion, the patent achieves high transmittance in the aperture while maintaining effective electric field control for contrast and viewing angle performance in different viewing zones
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 photo current leakage, enhances display performance, improves contrast and aperture ratio, and minimizes flickering and color shift, resulting in a better viewing experience with increased transmittance.
Implementation Method 1
a display device utilizing in-plane switching (IPS) mode is provided. In the IPS mode, an electric field is transversely applied to control the arrangement of the liquid-crystal molecules
Implementation Method 2
an electric field is transversely applied to control the arrangement of the liquid-crystal molecules, resulting in a wide viewing angle
Data Source
AI summary
A display device and a display substrate are provided. The display device includes a first substrate, having a surface; a gate line disposed on the substrate, wherein the gate line substantially extends along a first direction; a first data line and a drain electrode disposed on the substrate, and the data line intersecting with the gate line. In particular, a first opening projects onto the surface to form a first projection pattern, wherein the first projection pattern includes a first portion, and wherein the first portion is disposed between projections of the at least two finger portions onto the surface and outside a projection of the connecting portion onto the surface.