Liquid Crystal Display Roof Layer Partition Design
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Solution Overview
Problem
Liquid crystal displays with microcavities face alignment defects and reduced aperture ratios due to widened light blocking members, which compromise the display's efficiency and manufacturing speed.
Innovation Solution
A liquid crystal display design featuring a roof layer with partitions extending parallel to gate lines, a capping layer covering trenches, and inlet parts for alignment material injection, improving aperture ratio and capping process speed by minimizing barriers over data lines and flattening the roof layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the light blocking member is widened to prevent alignment defects in partition portions, then alignment reliability is improved, but the aperture ratio is reduced
Solution Approach 1:
The partition is segmented into two separate partitions: a first partition extending from the common electrode side and a second partition extending from the pixel electrode side. These two partitions meet but do not overlap, eliminating the need for a wide light blocking member while maintaining alignment reliability in both the partition portions and the microcavity portions.
Solution Approach 2:
The partition structure transitions from a single wide partition to a dual-partition configuration where the first and second partitions are positioned at different heights (dimensions). The first partition is at a first height from the substrate and the second partition is at a second height, creating a stepped structure that prevents alignment defects without requiring horizontal width expansion.
2Stability of the object's composition
If the roof layer is formed with continuous connection between neighboring microcavities to maintain microcavity structure, then structural stability is improved, but manufacturing complexity increases due to alignment defects in partition portions
Solution Approach 1:
The continuous roof layer is segmented into first and second partitions at different heights. The first partition connects neighboring microcavities at a first height while the second partition is positioned at a second height, creating a stepped structure that maintains structural stability while eliminating alignment defects in the partition portions.
Solution Approach 2:
Instead of forming a single continuous partition at one height level, the invention inverts the approach by creating partitions at two different height levels. The first partition is formed at a lower height and the second partition at a higher height, reversing the conventional single-level partition structure to solve the alignment defect problem.
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
Enhances aperture ratio and accelerates the capping process by reducing barriers and flattening the roof layer, ensuring efficient liquid crystal alignment and display performance.
Implementation Method 1
A liquid crystal display generates an image by applying a voltage to the electric field generating electrodes, to thereby generate an electric field on the liquid crystal layer. This electric field determines or induces an alignment of liquid crystal molecules of the liquid crystal layer, thus controlling the polarization of incident light.
Implementation Method 2
This electric field determines or induces an alignment of liquid crystal molecules of the liquid crystal layer, thus controlling the polarization of incident light.
Data Source
AI summary
A liquid crystal display according to an exemplary embodiment of the present disclosure includes: a substrate; a thin film transistor disposed on the substrate; a pixel electrode connected to the thin film transistor; a roof layer facing the pixel electrode; a liquid crystal layer including liquid crystal molecules disposed in a plurality of cavities between the pixel electrode and the roof layer; and wherein the roof layer comprises a partition, which extends substantially parallel to a gate line connected to the thin film transistor.