Display Device Light Blocking Layer Dichroic Pigment Alignment
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Solution Overview
Problem
Liquid crystal display devices face degradation in display quality due to external light, particularly from reflection and scattering, which affects viewing angles and luminance.
Innovation Solution
A display device configuration that includes a liquid crystal display panel with multiple optical layers: a polarizing layer, a light scattering layer with different refractive pattern parts, and a light blocking layer containing dichroic pigment and reactive mesogen, which are strategically positioned to minimize external light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light blocking layer with dichroic pigment is added to block external light, then reflection from external light is reduced, but transmittance of display light may be compromised
Solution Approach 1:
The light blocking layer uses dichroic pigment that selectively blocks external light in specific wavelengths while allowing display light to pass through. The reactive mesogen molecules are vertically aligned to create anisotropic optical properties that differentiate between viewing angles and light sources, blocking harmful reflections while maintaining display visibility.
Solution Approach 2:
The patent changes the optical parameters of the light blocking layer by controlling the alignment of reactive mesogen molecules and dichroic pigment orientation. By adjusting the molecular orientation angle and pigment concentration, the layer achieves selective light blocking characteristics that reduce external light reflection while preserving display light transmittance.
2Reliability
If optical layers are added to improve viewing angle characteristics, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single light blocking layer that simultaneously provides viewing angle compensation, external light blocking, and reflection reduction. The light scattering layer is integrated with the light blocking layer, creating a multi-functional optical component that reduces the total number of separate layers needed.
Solution Approach 2:
The light blocking layer with dichroic pigment and vertically aligned reactive mesogen serves multiple purposes: it blocks external light, reduces reflection, compensates for viewing angle characteristics, and maintains display transmittance. This multi-functional design eliminates the need for separate dedicated layers for each function.
3Object-affected harmful factors
If light scattering layer with refractive pattern parts is used to reduce external light effects, then reflection is minimized, but manufacturing precision requirements increase
Solution Approach 1:
The patent controls the refractive index difference between the light scattering layer and adjacent layers, and adjusts the size and shape parameters of the refractive pattern parts. By optimizing these parameters, the layer achieves effective light scattering and reflection reduction while maintaining manufacturability with standard precision capabilities.
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 solution effectively reduces reflection and scattering caused by external light, enhancing display quality and maintaining excellent transmittance characteristics while minimizing degradation at various viewing angles.
Implementation Method 1
a light blocking layer disposed on or below the linear polarizer layer, and including a dichroic pigment and a reactive mesogen
Implementation Method 2
including a dichroic pigment and a reactive mesogen
Implementation Method 3
a light scattering layer disposed on the polarizing layer and including a first refractive pattern part and a second refractive pattern part, wherein a refractive index of the second refractive index part is greater than a refractive index of the first refractive pattern part
Implementation Method 4
a light scattering layer disposed on the polarizing layer and including a first refractive pattern part and a second refractive pattern part
Implementation Method 5
a polarizing layer including a linear polarizer
Data Source
AI summary
A display device includes a liquid crystal display panel, and a plurality of optical layers disposed on the liquid crystal display panel, wherein the plurality of optical layers includes a polarizing layer including a linear polarizer, a light scattering layer disposed on the polarizing layer and including a first refractive pattern part and a second refractive pattern part, wherein a refractive index of the second refractive pattern part is greater than a refractive index of the first refractive pattern part; and a light blocking layer disposed on or below the linear polarizer layer, and including a dichroic pigment and a reactive mesogen.