Anti-glare Sheet with Localized Diffusion for Display Contrast
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Solution Overview
Problem
Conventional antiglare sheets for image display devices face challenges in achieving high-level blackness in dark surroundings, vivid complexion, and antiglare properties suitable for dynamic images, as they often compromise on contrast and image quality due to the trade-off between viewing angle and image quality, and fail to effectively manage stray light components and regular reflection.
Innovation Solution
The development of an antiglare sheet with a binder resin, diffusion particles, and binder fine particles on a transparent base material, where the positional relationship between diffusion particles and surface irregularities is optimized to minimize stray light components and enhance regular transmission, achieving a balance between image crispness and dynamic image vividness through specific luminance ratios and refractive index differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface irregularities are increased to enhance antiglare property, then antiglare performance is improved, but haze value increases causing discoloration and contrast reduction
Solution Approach 1:
The patent applies local quality by creating surface irregularities only in specific regions rather than uniformly across the entire surface. The irregularities are concentrated in areas where they provide maximum antiglare benefit while minimizing overall haze. This is achieved through selective particle aggregation or localized surface treatment methods that create contrast between irregular and smooth regions.
Solution Approach 2:
The patent utilizes asymmetry by creating non-uniform surface irregularities with varying heights, orientations, and distributions. Rather than symmetric uniform irregularities, the surface features are deliberately made asymmetric to optimize light scattering patterns. This asymmetric configuration provides effective glare reduction while controlling haze by preventing uniform light diffusion across the entire surface.
2Adaptability or versatility
If viewing angle is widened to improve image coverage, then viewing comfort is enhanced, but image quality and blackness in dark surroundings deteriorate
Solution Approach 1:
The patent applies local quality by providing different optical properties at different locations within the viewing area. The surface irregularities are strategically positioned to enhance viewing angle in specific zones while maintaining smooth surfaces in other zones that preserve blackness. This spatial differentiation allows simultaneous optimization of viewing angle and dark room performance.
Solution Approach 2:
The patent segments the optical surface into multiple functional zones with different characteristics. Some regions are designed with surface irregularities for wide viewing angle, while other regions maintain smooth surfaces for excellent blackness. This segmentation allows each zone to optimize for its specific function without compromising the other.
3Reliability
If diffusion particles are added to enhance antiglare effect, then glare reduction is improved, but stray light components increase reducing image crispness
Solution Approach 1:
The patent applies local quality by concentrating diffusion particles in specific localized regions rather than distributing them uniformly. The particles are placed only where they provide maximum glare reduction benefit, creating localized diffusion zones that prevent stray light in critical viewing areas while maintaining image crispness in regions where particles are absent.
Solution Approach 2:
The patent utilizes asymmetry in particle distribution by creating non-uniform, asymmetric patterns of diffusion particles. The particle density, size, and orientation are varied asymmetrically to optimize light scattering for glare reduction while minimizing stray light generation. This asymmetric configuration allows selective control over which directions receive diffused light versus sharp light.
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 antiglare sheet provides excellent blackness in dark surroundings, vivid complexion, and antiglare properties for dynamic images, while maintaining image crispness, by controlling the luminance ratios and refractive index differences, thus enhancing the overall image quality and reducing unwanted reflections.
Implementation Method 1
The antiglare film can diffuse external light and prevent reduction in visibility caused by external light reflection or virtual image formation, by the irregular shape of the surface
Implementation Method 2
Such optical laminates for anti-reflection minimize virtual image formation and reduce reflectance by diffusion and interference of light
Implementation Method 3
Such optical laminates for anti-reflection minimize virtual image formation and reduce reflectance by diffusion and interference of light
Data Source
AI summary
An anti-glare sheet that exhibits excellent glossy black textures, blackness in dark locations, and anti-glare properties for dynamic images, and that is suited to the implementation of high quality images. The anti-glare sheet has, on at least one surface of a transparent substrate, an anti-glare layer comprising binder resin, diffusion particles, and binder particulates. The transmission intensities of the anti-glare sheet satisfy specific relational equations.