Antiglare Light Diffusing Member with Dual-Particle Refractive Index Control
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Solution Overview
Problem
Existing antiglare light diffusing members for displays face challenges in controlling surface and internal diffusion of light, leading to issues with visibility, contrast, abrasion resistance, and glare, particularly when used on various display types such as LCD, CRT, and plasma displays.
Innovation Solution
An antiglare light diffusing member comprising a transparent base material with a binder matrix, first particles (A) and second particles (B), where the refractive index difference between the particles and the binder matrix is controlled to achieve separate surface and internal diffusion, allowing for independent control of surface and internal haze, thereby enhancing visibility and contrast while maintaining abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If surface irregularity is increased to improve light diffusing performance, then visibility is improved, but contrast is lowered and dazzle occurs
Solution Approach 1:
The invention divides the light diffusing function into two separate components: surface irregularity for surface scattering and particles embedded in the binder matrix for internal scattering. This segmentation allows independent optimization of each component to achieve desired light diffusion without excessive surface irregularity that causes dazzle.
Solution Approach 2:
The invention applies different scattering mechanisms at different locations: surface scattering at the front surface and internal scattering within the bulk material. This local differentiation enables controlled light diffusion while maintaining image quality and reducing harmful effects.
2Illumination intensity
If particles are added to the binder matrix to improve light diffusing performance, then visibility is improved, but manufacturing complexity increases
Solution Approach 1:
The invention combines surface irregularity and particles in the binder matrix into a single integrated antiglare light diffusing layer. This merging allows both surface scattering and internal scattering to work together while being manufactured as one layer, simplifying the overall manufacturing process compared to separate layers.
3Illumination intensity
If embossing finish is used to create surface irregularity, then light diffusing performance is improved, but abrasion resistance deteriorates
Solution Approach 1:
The invention creates a composite structure combining the binder matrix with dispersed particles having different refractive indices. This composite approach provides light diffusing performance through internal scattering while maintaining a relatively smooth surface that preserves abrasion resistance.
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 controls surface and internal diffusion, improving visibility and contrast while preventing glare and ensuring sufficient abrasion resistance, making it suitable for diverse display types without compromising image quality.
Implementation Method 1
by 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
difference between a refractive index of the plurality of first particles (A) and a refractive index of the binder matrix is less than or equal to 0.02, wherein difference between a refractive index of the plurality of second particles (B) and a refractive index of the binder matrix is 0.03-0.2
Data Source
AI summary
An antiglare light diffusing member is provided comprising a transparent base material and an antiglare light diffusing layer including a binder matrix, a plurality of particles (A) and a plurality of particles (B). A front surface of the antiglare light diffusing layer should not be flat. The difference between a refractive index of the plurality of particles (A) and a refractive index of the binder matrix can be less than or equal to 0.02. The difference between a refractive index of the plurality of particles (B) and a refractive index of the binder matrix can be 0.03-0.2. An average particle diameter of the plurality of particles (A) can be bigger than an average film thickness of the antiglare light diffusing layer. An average particle diameter of the plurality of particles (B) is smaller than an average film thickness of the antiglare light diffusing layer.