Optical Sheet Composite Structure Eliminates Newton's Rings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical sheets face challenges in minimizing Newton's rings and maintaining brightness, as current manufacturing methods either fail to completely eliminate reflective Newton's rings or result in significant brightness loss when increasing haze to achieve this.
Innovation Solution
An optical sheet with a composite structure featuring a combination of first and second convex or concave shapes on its surface, where the average size of the first shapes is larger than the second shapes, and the average roughness is optimized between 0.4 and 0.45 μm, is developed, using a combination of FTS and sandblasting processes to enhance diffusion area and reduce light scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the haze of the surface is increased to eliminate Newton's ring, then Newton's ring is eliminated, but brightness drops significantly
Solution Approach 1:
The patent applies local quality by creating a composite structure with two types of convex shapes having different properties: first convex shapes with larger size and lower density that provide diffusion, and second convex shapes with smaller size and higher density that specifically target Newton's ring elimination. This localized differentiation allows each region to perform its specific function optimally without compromising overall brightness.
Solution Approach 2:
The patent employs composite materials by combining two different convex shape structures into a single composite surface. The first convex shapes (with parameters: average size 10-50 μm, density 30-70%) and second convex shapes (with parameters: average size 5-30 μm, density 70-90%) work together synergistically to achieve both diffusion and Newton's ring elimination while maintaining brightness.
2Object-affected harmful factors
If the density of convex lumps is increased to eliminate Newton's ring, then Newton's ring is eliminated, but surface becomes coarser and brightness drops
Solution Approach 1:
The patent applies local quality by creating a composite structure with two types of convex shapes having different properties: first convex shapes with larger size and lower density that provide diffusion, and second convex shapes with smaller size and higher density that specifically target Newton's ring elimination. This localized differentiation allows each region to perform its specific function optimally without compromising overall brightness.
Solution Approach 2:
The patent employs composite materials by combining two different convex shape structures into a single composite surface. The first convex shapes (with parameters: average size 10-50 μm, density 30-70%) and second convex shapes (with parameters: average size 5-30 μm, density 70-90%) work together synergistically to achieve both diffusion and Newton's ring elimination while maintaining brightness.
3Ease of manufacture
If the convex lumps are made more regular to improve manufacturing, then manufacturing is easier, but Newton's ring occurs more easily
Solution Approach 1:
The patent employs composite materials by combining two different convex shape structures into a single composite surface. The first convex shapes (with parameters: average size 10-50 μm, density 30-70%) and second convex shapes (with parameters: average size 5-30 μm, density 70-90%) work together synergistically to achieve both diffusion and Newton's ring elimination while maintaining brightness.
Solution Approach 2:
The patent applies local quality by creating a composite structure with two types of convex shapes having different properties: first convex shapes with larger size and lower density that provide diffusion, and second convex shapes with smaller size and higher density that specifically target Newton's ring elimination. This localized differentiation allows each region to perform its specific function optimally without compromising overall brightness.
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 composite structure effectively eliminates reflective Newton's rings while maintaining high brightness, with a slight increase in haze that does not significantly impact light transmission, offering improved anti-Newton's ring performance and brightness retention.
Implementation Method 1
the fourth surface of the film comprises a structure corresponding to a combination of a plurality of first convex shapes and a plurality of second convex or concave shapes superimposed on the plurality of first convex shapes
Implementation Method 2
enhance diffusion area and reduce light scattering
Implementation Method 3
The surface configuration of the backside structure of the top prism sheet can be optimized to destroy the interference of the incident backlight and the incident environment light so as to eliminate Newton's ring
Implementation Method 4
Newton's ring results from light interference between two adjacent interfaces
Data Source
AI summary
The present invention discloses a method of forming an optical sheet. The optical sheet comprises a substrate and a film. The substrate has a first surface and a second surface opposite to the first surface. The film has a third surface and a fourth surface opposite to the third surface. The third surface of the film is on the first surface of the substrate. The fourth surface of the film comprises a structure corresponding to a combination of a plurality of first convex shapes and a plurality of second convex or concave shapes superimposed on the plurality of first convex shapes.