Varied Viewing Angle Light Control Film
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Solution Overview
Problem
Conventional light control films (LCFs) have limited flexibility in adjusting viewing angles, which restricts their application in providing privacy and optimizing image visibility across varying angles without significant loss of light transmission or aesthetic appeal.
Innovation Solution
The development of LCFs with varied viewing angles achieved by modifying the shape, pattern, or composition of light absorptive regions, or by integrating with lens arrays or multilayer optical films, allowing for improved control over the arrangement and functionality of light absorptive regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional light control films use uniform light absorbing regions, then manufacturing is simple, but viewing angle control is limited
Solution Approach 1:
The patent applies local quality by varying the properties of light absorbing regions at different locations. Specifically, the groove depth, width, or light absorbing material composition is modified in different regions of the film to create different viewing angles for different areas, allowing localized control of optical properties while maintaining overall film functionality
Solution Approach 2:
The patent segments the light absorbing regions into different sub-pluralities (first, second, third sub-pluralities) with distinct characteristics. Each sub-plurality has different groove dimensions or material properties that create different viewing angles, enabling the film to provide varied viewing angle control across different zones without requiring a completely different film structure
2Object-affected harmful factors
If light control film blocks light at higher viewing angles for privacy, then privacy is improved, but light transmission at normal incidence is reduced
Solution Approach 1:
The patent uses parameter changes by precisely controlling the groove depth, width, and light absorbing material properties to optimize the balance between privacy protection and light transmission. By adjusting these parameters, the film achieves effective light blocking at high viewing angles while maintaining adequate transmission at normal viewing angles, resolving the trade-off between privacy and energy loss
3Object-affected harmful factors
If light control film uses deeper grooves to increase viewing cutoff angle, then privacy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies partial action by using multiple sub-pluralities of light absorbing regions with progressively different groove depths rather than requiring one uniformly deep groove structure. This approach achieves the desired viewing cutoff angle through the combined effect of multiple regions with moderate depth variations, reducing the manufacturing precision burden compared to creating a single set of uniformly deep grooves
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 approach enhances the aesthetic and efficiency of LCFs by maintaining image clarity and privacy across different viewing angles while optimizing light transmission and reducing heat buildup in solar cell applications.
Implementation Method 1
each first light absorbing region substantially absorbing light in a first predetermined wavelength range and substantially transmitting light in a nonoverlapping second predetermined wavelength range
Data Source
AI summary
A light control film includes a plurality of spaced apart substantially parallel first light absorbing regions arranged along a first direction, each first light absorbing region having a width and a height, the plurality of first light absorbing regions including nonoverlapping first and second sub-pluralities of the plurality of first light absorbing regions, the first sub-plurality of the plurality of first light absorbing regions having a first viewing angle, the second sub-plurality of the plurality of first light absorbing regions having a different second viewing angle.