LCD Light Blocking Pattern Prevents Blue Pixel Texture Defects
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Solution Overview
Problem
LCD devices suffer from display defects due to texture defects caused by column spacer movement, leading to light leakage and issues like brightness deterioration and horizontal line defects, especially in blue pixel regions, resulting from misalignment or external shocks.
Innovation Solution
The modification of the shape of storage extending portions and bridge electrodes, which are formed from the same metal as the pixel electrode, includes a light blocking pattern with diagonal sides that overlap the pixel electrode, preventing light leakage by forming a fringe field that maintains the orientation of liquid crystal molecules, thereby reducing the risk of texture defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a column spacer is formed at a region adjacent to a blue pixel region to maintain cell gap, then the cell gap is maintained, but the texture defect occurs when the column spacer is shocked or impacted causing light leakage
Solution Approach 1:
The pixel electrode is divided into multiple regions with different potentials, and the light blocking pattern is segmented to specifically cover vulnerable areas around the column spacer without affecting the entire pixel region, thus maintaining cell gap while preventing texture defects locally
Solution Approach 2:
A light blocking pattern is introduced as an intermediary element between the column spacer and the liquid crystal molecules to prevent the harmful effect of column spacer movement from reaching the liquid crystal, thereby protecting against texture defects while maintaining the structural function of the column spacer
2Adaptability or versatility
If the black matrix and column spacer are moved by external physical shock or impact, then misalignment occurs, but the texture control defect occurs due to light leakage
Solution Approach 1:
The light blocking pattern is formed in advance at the vulnerable regions around the column spacer before any shock or impact occurs, creating a protective barrier that prevents texture defects even when misalignment happens due to external forces
Solution Approach 2:
The potential harmful effect of column spacer movement is converted into a beneficial protective function by using the light blocking pattern to contain and control the light leakage that would otherwise cause texture defects, turning a vulnerable structure into a protected one
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
This solution effectively prevents light leakage and texture defects, even when the column spacer is moved by external impacts, improving the display quality and preventing yellowish phenomena, especially in blue pixel regions, by maintaining the orientation of liquid crystal molecules and reducing misalignment issues.
Implementation Method 1
forming a fringe field to equally distribute the tilt direction of liquid crystal molecules in four directions
Data Source
AI summary
A liquid crystal display (LCD) device and a method of fabricating the same includes a gate line arranged in one direction, a data line arranged in a perpendicular direction to the gate line, a pixel electrode arranged in a pixel region defined by the gate and data lines and having a diagonal side adjacent to a crossing portion of the gate and data lines, and a light blocking pattern arranged in a parallel direction with respect to the diagonal side of the pixel electrode and preventing light leakage.