Luminance Enhancement Film with Embedded Diffusion Particles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multifunctional optical sheets for flat panel displays face issues such as optical coupling effects like Newtonian rings, increased production costs due to multiple-pass processes, and reduced light-enhancing and diffusing capabilities in single-layer configurations, which hinder effective brightness enhancement and diffusion.
Innovation Solution
A luminance enhancement film with a built-in light diffusing structure, where particles are integrated into the support substrate layer, eliminating the need for a separate particle layer and reducing the thickness of the sheet, thereby enhancing luminance and diffusion while minimizing defects and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a separate particle layer is added to achieve light diffusion function, then diffusion capability is improved, but device complexity and production cost increase
Solution Approach 1:
The patent combines the light diffusion function (previously requiring a separate particle layer) with the support substrate by incorporating particles directly into the support substrate material. This merging eliminates the need for a separate particle layer while maintaining the diffusion capability, thereby reducing device complexity and production cost.
Solution Approach 2:
The support substrate is designed to perform multiple functions simultaneously: it provides mechanical support and integrates the light diffusion function through embedded particles. This multi-functionality eliminates the need for separate functional layers, reducing overall device complexity while maintaining effective light diffusion.
2Object-generated harmful factors
If multiple optical films are used to achieve both brightness enhancement and diffusion, then functional capability is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the support substrate and particle layer into a single integrated component. The particles are incorporated directly into the support substrate during manufacturing, eliminating the need for separate coating or lamination processes. This integration simplifies the manufacturing process while maintaining both structural support and light diffusion functions.
3Object-generated harmful factors
If a multifunctional film with both structured surface and particle layer is created, then light enhancement and diffusion are improved, but film thickness increases
Solution Approach 1:
The patent combines the structured surface and particle-containing layers into a single integrated support substrate. By incorporating particles within the substrate material rather than adding a separate layer, the design achieves both light enhancement through structuring and diffusion through particles without increasing overall film thickness.
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 reduces Newtonian rings, eliminates the need for extra coating layers, and improves light distribution, resulting in enhanced brightness and reduced thickness of backlight structures, making it suitable for modern display device designs.
Implementation Method 1
The micro-structures provided at the light emitting surface changes the angle of the film/air interface for light rays exiting the films and causes light incident obliquely at the light input surface of the films to be redistributed in a direction more normal to the light emitting surface
Implementation Method 2
The brightness enhancement films use micro-structures to direct light along the viewing axes
Implementation Method 3
a support substrate that incorporates a dispersion of particles for light diffusion
Data Source
AI summary
The present invention discloses a light redirecting film. The light redirecting film comprises a support substrate and an optical substrate. The support substrate comprises a unitary body, wherein the unitary body has a first surface and a second surface opposite to the first surface. The optical substrate has a third surface and a fourth surface opposite to the third surface, wherein the fourth surface is a structured surface, and the second surface of the unitary body faces the third surface of the optical substrate. A plurality of particles are disposed in a region below the first surface of the unitary body, wherein the thickness of the region is smaller than the thickness of the unitary body.