Electronic Device With Dual Liquid Crystal Panels for Anti-Peeping
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Solution Overview
Problem
Current anti-peeping designs for electronic devices have weak anti-peeping abilities at small viewing angles, typically less than 40 degrees.
Innovation Solution
The electronic device incorporates a first and second viewing angle control panel with liquid crystal layers having different refractive index differences, layer spacings, and alignment directions, allowing for adjustable viewing angles to enhance anti-peeping capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single liquid crystal layer with fixed parameters is used, then the device structure is simple, but the anti-peeping ability at small viewing angles is weak
Solution Approach 1:
The patent divides the single liquid crystal layer into multiple layers (first liquid crystal layer and second liquid crystal layer) with different parameters. Each layer has specific refractive index differences, layer spacings, and alignment directions that are optimized for different viewing angle ranges, thereby improving overall anti-peeping ability while maintaining manageable structural complexity through modular design
Solution Approach 2:
The patent applies different liquid crystal layer configurations to different viewing angle regions. The first liquid crystal layer is optimized for small viewing angles (less than 40 degrees) while the second liquid crystal layer addresses larger viewing angles. Each layer has locally optimized parameters including specific refractive index differences, spacings, and alignment directions tailored to its functional requirements
2Reliability
If the liquid crystal layer spacing is increased to improve anti-peeping effect, then the anti-peeping ability improves, but the device thickness increases
Solution Approach 1:
The patent segments the total liquid crystal thickness into multiple thinner layers with different spacing values. Instead of using a single thick layer, it employs a first liquid crystal layer with a first spacing and a second liquid crystal layer with a second spacing. This segmentation allows achieving the desired anti-peeping effect through combined optical path differences while keeping individual layer thicknesses manageable and the overall device compact
Solution Approach 2:
The patent optimizes the spacing parameters of different liquid crystal layers to achieve the desired anti-peeping effect. By carefully selecting and adjusting the first liquid crystal layer spacing and second liquid crystal layer spacing, along with their respective refractive index differences, the system achieves enhanced anti-peeping capability without requiring excessive thickness, balancing performance with device compactness
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 design improves anti-peeping ability at small viewing angles by optimizing the product of refractive index difference and layer spacing, and adjusting the liquid crystal average alignment shift angle, effectively reducing the viewing angle at minimum brightness.
Implementation Method 1
The first liquid crystal layer has a first liquid crystal refractive index difference value, a first liquid crystal layer spacing, and a first liquid crystal average alignment direction. The second liquid crystal layer has a second liquid crystal refractive index difference value, a second liquid crystal layer spacing, and a second liquid crystal average alignment direction.
Data Source
AI summary
An electronic device includes a first viewing angle control panel and a second viewing angle control panel. The first viewing angle control panel includes a first liquid crystal layer. The first liquid crystal layer has a first liquid crystal refractive index difference value, a first liquid crystal layer spacing, and a first liquid crystal average alignment direction. The second viewing angle control panel overlaps the first viewing angle control panel and includes a second liquid crystal layer. The second liquid crystal layer has a second liquid crystal refractive index difference value, a second liquid crystal layer spacing, and a second liquid crystal average alignment direction. A product of the first liquid crystal refractive index difference value and 10 the first liquid crystal layer spacing is different from a product of the second liquid crystal refractive index difference value and the second liquid crystal layer spacing, and the first liquid crystal average alignment direction is different from the second liquid crystal average alignment direction.