Liquid Crystal Display Cell Gap Structure to Minimize Light Scattering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices with polymer dispersed liquid crystal layers face issues with light scattering anomalies and non-uniformity due to improper alignment of liquid crystal molecules, leading to degraded display quality and increased manufacturing complexity.
Innovation Solution
A display device configuration featuring a first substrate with a protruding portion from its insulating film to support the second substrate, forming a controlled cell gap and reducing the entry of liquid crystal material into gaps, thereby minimizing light scattering and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If liquid crystal material is filled in gaps between substrates, then the cell gap is formed, but light scattering occurs due to improper alignment of liquid crystal molecules
Solution Approach 1:
The protruding portion is formed on the first substrate before the liquid crystal material is filled. This preliminary structural formation ensures that the cell gap is pre-defined and controlled, preventing liquid crystal material from entering gaps and causing improper alignment. The protruding portion acts as a pre-formed spacer that guides the liquid crystal material into the correct position, eliminating light scattering issues.
Solution Approach 2:
The protruding portion serves as an intermediary structure between the first substrate and the second substrate. It mediates the formation of the cell gap by physically separating the substrates and preventing direct contact. This intermediary structure ensures uniform gap formation and prevents liquid crystal material from creating unwanted gaps that would cause light scattering.
2Manufacturing precision
If protruding portion is added to support second substrate, then manufacturing complexity increases, but display quality improves
Solution Approach 1:
The protruding portion is integrated directly into the first substrate as a single piece, merging the support function with the substrate structure. This integration eliminates the need for separate support components or complex assembly processes. The protruding portion is formed using the same manufacturing process as the substrate itself, reducing overall device complexity while maintaining alignment precision.
Solution Approach 2:
The protruding portion performs multiple functions: it supports the second substrate, defines the cell gap, and prevents liquid crystal material from entering gaps. This multi-functionality reduces the need for additional separate components, thereby reducing manufacturing complexity while achieving precise alignment and improved display quality.
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 proposed configuration improves display quality by reducing light scattering and manufacturing costs through precise alignment and simplified manufacturing processes.
Implementation Method 1
The polymer dispersed liquid crystal layer can switch a transparent state in which light is transmitted and a scattered state in which light is scattered, depending on the application of voltage.
Implementation Method 2
The organic insulating film includes an upper surface facing the second substrate and a protruding portion protruding from the upper surface onto the second substrate to support the second substrate.
Data Source
AI summary
According to one embodiment, a display device includes a first substrate, a second substrate overlapping with the first substrate, and a liquid crystal layer. The first substrate includes a scanning line, a signal line, a switching element electrically connected to the scanning line and the signal line, and an organic insulating film including an aperture and overlapping with the scanning line, the signal line, and the switching element. The organic insulating film includes an upper surface facing the second substrate and a protruding portion protruding from the upper surface onto the second substrate to support the second substrate.