Antiglare Light Diffusing Member with Dual Refraction Particles
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Solution Overview
Problem
Existing antiglare light diffusing members for displays face challenges in independently adjusting surface and internal haze values, leading to issues with image sharpness, contrast, and abrasion resistance, particularly when used on various display types with different resolutions and purposes.
Innovation Solution
An antiglare light diffusing member is developed using a combination of surface and internal diffusion, featuring a binder matrix with two types of particles (A and B) where the refraction index difference between particle A and the binder matrix is less than 0.02, and between particle B and the binder matrix is 0.03-0.20, allowing for independent control of surface and internal haze values, and incorporating a transparent base material for enhanced hardness and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If particles are mixed in a binder matrix to create surface irregularity for light scattering, then light scattering performance is improved, but manufacturing precision and reproducibility deteriorate due to defects and foreign substances
Solution Approach 1:
The invention divides the light scattering function into two separate components: surface irregularity (for surface scattering) and particles in binder matrix (for internal scattering). This segmentation allows each component to be optimized independently, with surface irregularity providing controlled scattering without the manufacturing defects associated with particle mixing.
Solution Approach 2:
The invention extracts the surface irregularity component from the particle-mixing approach. By forming surface irregularity through embossing or molding separately from the binder matrix, the patent eliminates the defects and reproducibility issues inherent in mixing particles, while retaining the light scattering benefit.
2Manufacturing precision
If embossing finish is used to create surface irregularity for complete control of surface properties, then manufacturing precision is improved, but abrasion resistance and contrast deteriorate
Solution Approach 1:
The invention creates a composite structure combining surface irregularity layer with a binder matrix containing particles. This composite approach allows the surface irregularity to provide controlled light scattering for manufacturing precision, while the underlying binder matrix with particles provides enhanced abrasion resistance and maintains contrast through internal scattering mechanisms.
3Illumination intensity
If surface irregularity is increased to improve light scattering performance, then visibility is improved, but image sharpness deteriorates due to excessive diffusion
Solution Approach 1:
The invention segments the light scattering function into surface scattering (from surface irregularity) and internal scattering (from particles in binder matrix). This allows optimization of surface irregularity for visibility improvement while using controlled particle distribution to maintain image sharpness, preventing excessive diffusion.
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 solution enables easy adjustment of surface and internal haze values, improving image clarity and abrasion resistance while maintaining high-resolution display quality across different applications, including liquid crystal displays and other display types.
Implementation Method 1
mixing particles having a refraction index different from that of a binder matrix into the binder matrix, utilizes internal scattering (internal diffusion) of light based on the difference in refraction indices of the binder matrix and particles
Implementation Method 2
the difference between the refraction index of particle A and the refraction index of the binder matrix is less than 0.02, and the difference between the refraction index of particle B and the refraction index of the binder matrix is in the range of 0.03-0.20
Implementation Method 3
scattering phenomenon (surface diffusion) of light caused by surface irregularity
Data Source
AI summary
The present invention aims to provide an antiglare light diffusing member utilizing internal diffusion and surface diffusion in combination, wherein a surface haze value mainly representing the degree of the surface diffusion and an internal haze value mainly representing the degree of the internal diffusion are easily adjusted independently from each other. An antiglare light diffusing member comprising an antiglare light diffusing layer comprising a binder matrix and a particle A and a particle B on a transparent base material, wherein the difference between the refraction index of the particle A and the refraction index of the binder matrix is less than 0.02, and the difference between the refraction index of the particle B and the refraction index of the binder matrix is in the range of 0.03-0.20.