Auxiliary Electrode for Liquid Crystal Display Panel Color Shift
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Solution Overview
Problem
Existing liquid crystal display devices suffer from color shift due to light emission from adjacent pixel units mixing, which degrades the display effect and light transmittance.
Innovation Solution
Incorporating an auxiliary electrode on the liquid crystal display panel that corresponds to the area where the electric field formed by pixel and common electrodes, ensuring the electric field is more concentrated within each pixel unit, thereby preventing light emission between adjacent units and enhancing light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an auxiliary electrode is added to concentrate the electric field, then color shift is reduced and display quality improves, but device structure and manufacturing complexity increase
Solution Approach 1:
The electrode system is segmented into three distinct components: pixel electrodes, common electrodes, and auxiliary electrodes. The auxiliary electrodes are specifically positioned at the boundaries between pixel units to segment and confine the electric field, preventing it from extending into adjacent pixel regions. This segmentation resolves the contradiction by adding a targeted structural element that improves color shift control without requiring complete redesign of the entire electrode system.
Solution Approach 2:
The auxiliary electrodes are strategically placed only at the boundary regions between pixel units, rather than uniformly across the entire display. This local quality approach concentrates the electric field control exactly where needed (at the boundaries) to prevent light mixing, while leaving the central pixel regions unchanged. This resolves the contradiction by applying complexity only locally where it provides benefit, rather than increasing overall device complexity uniformly.
2Speed
If the liquid crystal layer thickness is reduced to improve response speed, then display response time improves, but light transmittance and electric field control deteriorate
Solution Approach 1:
The patent employs dynamic electric field management by introducing auxiliary electrodes that can be independently controlled. These auxiliary electrodes dynamically adjust the electric field distribution in real-time, strengthening the field within pixel units while suppressing it at boundaries. This dynamic control compensates for the reduced liquid crystal layer thickness, maintaining reliable electric field control even as response speed increases through thinner layers.
Solution Approach 2:
The auxiliary electrodes act as a counterbalancing mechanism that compensates for the weakened electric field effect caused by reduced liquid crystal layer thickness. By positioning auxiliary electrodes at boundaries and applying opposite polarity voltages, they create a counteracting electric field that prevents field leakage and maintains precise control. This counterweight approach allows the system to achieve fast response times with thin layers while preserving electric field control reliability.
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 alleviates color shift and improves light transmittance by concentrating the electric field within each pixel unit, ensuring better control over liquid crystal molecules and preventing light mixing between adjacent units.
Implementation Method 1
a pixel electrode and a common electrode are configured to form an electric field that drives the liquid crystal layer
Implementation Method 2
a liquid crystal layer sandwiched between the first substrate and the second substrate
Implementation Method 3
A vertical projection of the auxiliary electrode on the first substrate covers an area where the electric field is formed by the pixel electrode and the common electrode
Data Source
AI summary
A liquid crystal display panel and a liquid crystal display device are provided. The liquid crystal display panel comprises a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrate, and an auxiliary electrode. The first substrate includes a plurality of gate electrode lines and a plurality of data lines intersected to define a plurality of pixel units. Each pixel unit corresponds to a pixel electrode and a common electrode. In each region corresponding to one pixel unit, the pixel electrode and the common electrode are configured to form an electric field that drives the liquid crystal layer. A vertical projection of the auxiliary electrode on the first substrate covers an area where the electric field is formed by the pixel electrode and the common electrode, and a thickness of the liquid crystal layer is less than or equal to 3.2 μm.