Reactive Mesogen Compensation Layer for LCD Light Leakage
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Solution Overview
Problem
Liquid crystal display devices suffer from a light leakage phenomenon, particularly noticeable at wide viewing angles, which is exacerbated by the use of polarizers and compensation films, leading to increased costs due to the need for additional compensation films.
Innovation Solution
Incorporating an optical compensation layer made of reactive mesogen material in the color filter array of the liquid crystal display device, which acts as a compensation film, reducing the number of required films and thus lowering production costs while minimizing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polarizers and compensation films are used to control light transmittance, then image quality is improved, but light leakage increases and cost increases
Solution Approach 1:
The patent combines the color filter layer and compensation film into a single integrated structure. The compensation film is formed in the same layer as the color filter, eliminating the need for separate compensation films while maintaining both color display and light leakage control functions.
Solution Approach 2:
The color filter layer is designed to serve dual functions: displaying colors and compensating for light leakage. By incorporating compensation functionality into the existing color filter layer, the patent eliminates the need for additional dedicated compensation films, reducing both cost and light leakage issues.
2Object-generated harmful factors
If additional compensation films are added to reduce light leakage, then light leakage is reduced, but manufacturing cost increases
Solution Approach 1:
The patent merges the compensation film function with the color filter layer, forming a single integrated structure. This eliminates the need for additional compensation films and reduces manufacturing steps, thereby lowering production costs while maintaining light leakage control.
Solution Approach 2:
The color filter layer is designed to perform both color display and light leakage compensation functions simultaneously. This multi-functional design eliminates the need for separate compensation films, reducing material costs and manufacturing complexity.
3Adaptability or versatility
If horizontal electric field is used to achieve wide viewing angle, then viewing angle is improved, but light leakage increases
Solution Approach 1:
The patent combines the color filter and compensation functions in a single layer structure, enabling the horizontal electric field IPS mode to achieve wide viewing angles while the integrated compensation layer simultaneously controls light leakage that would otherwise occur with this electrode configuration.
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 use of a reactive mesogen compensation layer effectively reduces light leakage and maintains image quality across various viewing angles, achieving cost savings by eliminating the need for additional compensation films.
Implementation Method 1
an optical compensation layer which is formed of a reactive mesogen in the color filter array
Implementation Method 2
Liquid crystal molecules 41 horizontally arranged between an alignment film 39 of the thin film transistor substrate 70 and an alignment film 42 of the color filter substrate 80 are rotated by a dielectric anisotropy caused by the horizontal electric field
Data Source
AI summary
A liquid crystal display device comprises a color filter substrate that includes a color filter array and a first substrate. The color filter array is disposed on the first substrate. The liquid crystal display device comprises a thin film transistor substrate that includes a thin film transistor array and a second substrate. The thin film transistor array is disposed on the second substrate. The second substrate is bonded with the first substrate with liquid crystal cells therebetween. The color filter substrate further includes an optical compensation layer that is formed of a reactive mesogen in the color filter array.