Liquid Crystal Display Refractive Index Layers
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Solution Overview
Problem
Liquid crystal display devices face challenges in achieving high accuracy image formation and light utilization efficiency due to misalignment and shape variations in microlenses during the lithography and etching processes, especially when stacking multiple three-dimensional microlenses.
Innovation Solution
A liquid crystal display device configuration featuring a first substrate with a microlens and a second substrate, where a first transparent material layer with a specific refractive index is formed between the microlens and the liquid crystal material layer, and a second transparent material layer with a different refractive index is disposed between adjacent pixels, utilizing a multilayer laminate film and lattice-shaped arrangements to enhance light convergence and utilization efficiency without the need for stacked three-dimensional microlenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple three-dimensional microlenses are stacked to increase light utilization efficiency, then light utilization efficiency is improved, but manufacturing precision deteriorates due to misalignment and shape variation in the lithography and etching processes
Solution Approach 1:
The patent extracts the light convergence function from the complex three-dimensional microlens structure and implements it using a combination of a microlens and a transparent material layer with a specific refractive index. This simplifies the structure to a single substrate while maintaining light utilization efficiency, thereby avoiding the alignment and manufacturing precision issues associated with stacking multiple three-dimensional microlenses.
Solution Approach 2:
The patent changes the optical parameters by introducing a transparent material layer with a refractive index different from both the microlens material and the surrounding medium. This parameter change enables the layer to contribute to light convergence and utilization efficiency without requiring the complex three-dimensional stacked structure, thus resolving the manufacturing precision problem while maintaining energy efficiency.
2Loss of energy
If multiple three-dimensional microlenses are stacked to improve light utilization efficiency, then light utilization efficiency is improved, but device complexity increases
Solution Approach 1:
The patent extracts the essential light convergence function from the complex stacked microlens system and implements it using a simplified structure consisting of a single microlens and a transparent material layer. This extraction eliminates the need for multiple stacked components, thereby reducing device complexity while maintaining light utilization efficiency.
Solution Approach 2:
The transparent material layer serves multiple functions: it acts as an optical element for light convergence, a structural layer for substrate support, and a medium with controlled refractive index for optimizing light paths. This multi-functionality allows the simplified single-substrate structure to achieve the performance of complex stacked structures without the associated complexity.
3Manufacturing precision
If a single substrate with transparent material layer is used instead of stacked microlenses, then manufacturing precision is improved, but light utilization efficiency may deteriorate
Solution Approach 1:
The patent carefully selects and controls the refractive index parameter of the transparent material layer to optimize its light convergence capability. By adjusting this parameter, the single-substrate structure achieves light utilization efficiency comparable to stacked microlenses while maintaining manufacturing precision advantages.
Solution Approach 2:
The patent creates a composite optical structure combining the microlens material and the transparent material layer with different refractive indices. This composite structure leverages the complementary optical properties of both materials to achieve effective light convergence and high utilization efficiency without requiring multiple stacked substrates, thus maintaining manufacturing precision.
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 configuration improves light utilization efficiency and reduces wraparound effects, allowing for high-definition imaging without the complexity of aligning multiple three-dimensional microlenses, while also preventing cracks during heat treatment processes.
Implementation Method 1
a first transparent material layer including a material having a first refractive index is formed in the first substrate, and a material having a second refractive index different from the first refractive index is disposed in a portion of the first transparent material layer corresponding to a region between adjacent pixels, and a second transparent material layer including a material having a third refractive index is formed in the second substrate, and a material having a fourth refractive index different from the third refractive index is disposed in a portion of the second transparent material layer corresponding to the region between adjacent pixels
Data Source
AI summary
Provided is a liquid crystal display device that includes a first substrate including a microlens corresponding to each pixel, a second substrate disposed to face the first substrate, and a liquid crystal material layer sandwiched between the first substrate and the second substrate. A first transparent material layer including a material having a first refractive index is formed in the first substrate, and a material having a second refractive index different from the first refractive index is disposed in a portion of the first transparent material layer corresponding to a region between adjacent pixels. A second transparent material layer including a material having a third refractive index is formed in the second substrate, and a material having a fourth refractive index different from the third refractive index is disposed in a portion of the second transparent material layer corresponding to the region between the adjacent pixels.