Barrier Structures in LCD Array Substrates for Luminance Uniformity
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Solution Overview
Problem
In liquid crystal display devices using Advanced Super Dimension Switch (ADS) technology, electrical fields applied around data lines create liquid crystal orientation faults, leading to partial black display and uneven luminance when the panel is touched, as the common electrodes are located below the pixel electrodes, causing liquid crystal misalignment.
Innovation Solution
The implementation of barrier structures, either convex or concave, on both sides of the data lines and gate lines to prevent liquid crystal orientation faults, which are formed using materials like silicon nitride, silicon dioxide, or resin, and are integrated into the passivation or insulation layers to control the electrical field and prevent misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If common electrodes are located below pixel electrodes to achieve high light transmission efficiency, then light transmission efficiency is improved, but liquid crystal orientation faults occur around data lines causing uneven luminance
Solution Approach 1:
An insulating layer is introduced as an intermediary between the common electrode and the liquid crystal layer. This insulating layer acts as a mediator that prevents direct electrical field interference from the common electrode on the liquid crystal molecules, thereby eliminating orientation faults while preserving the high light transmission efficiency achieved by the bottom-common-electrode configuration.
2Reliability
If barrier structures are added to prevent liquid crystal orientation faults, then liquid crystal alignment is improved, but device complexity increases
Solution Approach 1:
The barrier structure is merged with the insulating layer that is already present in the device architecture. By combining the barrier function with the existing insulating layer, the patent achieves liquid crystal orientation control without adding separate, complex barrier structures, thus improving reliability while minimizing increases in device complexity.
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 barrier structures effectively prevent the liquid crystal orientation fault from extending inwardly and resolve the issue of displaying different luminance by controlling the electrical field and maintaining uniform luminance across the display.
Implementation Method 1
electrical fields applied to the liquid crystal around the data lines are in different directions because the common electrodes of the liquid crystal panel are located below the pixel electrodes
Data Source
AI summary
Embodiments of the present invention provide a liquid crystal display device, an array substrate and a method for manufacturing the same. The liquid crystal display device comprises a color filter substrate and an array substrate which are assemblied together to form a cell, the array substrate comprising gate lines, data lines and a plurality of pixel units defined by intersecting of the gate lines and the date lines, each of which comprises a pixel electrode, wherein barrier structures are disposed on both sides of the data lines and the gate lines.