Composite Optical Film with Reversed Prisms and Diffusion Layer
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Solution Overview
Problem
Conventional composite optical films used with Light Guide Plates suffer from decreased brightness and uniformity due to separate upper and lower prism films increasing overall thickness, and inefficiencies in light diffusion.
Innovation Solution
A composite optical film design integrating a first optical film with reversed prisms and a diffusion layer, and a second optical film with prisms, using an adhesive layer to laminate the prisms, which can be either integrated or separate, with specific substrate and prism configurations to enhance light directionality and diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If separate upper prism film and lower prism film are used, then light directionality is improved, but overall thickness increases
Solution Approach 1:
The patent combines the upper prism film and lower prism film into a single integrated composite optical film structure. The first substrate and second substrate are bonded together through an adhesive layer, with the first reversed prisms on the bottom surface of the first substrate and the second prisms on the top surface of the second substrate, creating a unified thin-film solution that maintains light directionality while reducing overall thickness.
2Illumination intensity
If separate upper diffuser and prism films are used, then light diffusion is improved, but device complexity increases
Solution Approach 1:
The patent integrates the diffusion function and prism function into a single composite optical film. The first diffusion layer is formed on the top surface of the first substrate, while the first reversed prisms are formed on the bottom surface of the first substrate, combining both diffusion and directionality functions in one integrated component rather than using separate films.
3Illumination intensity
If multiple separate optical films are stacked, then optical performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent consolidates multiple optical functions into a single manufacturable structure. The first substrate with reversed prisms and diffusion layer, bonded to the second substrate with prisms through an adhesive layer, forms one integrated component that can be manufactured as a single unit, reducing the complexity of stacking and aligning multiple separate films during assembly.
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 design improves brightness, uniformity, and reduces thickness, achieving higher light leveling and coverage while minimizing adsorption issues with the Light Guide Plate.
Implementation Method 1
a first plurality of prisms, disposed on a top surface of the second substrate; a second plurality of prisms, disposed on a top surface of the third substrate
Implementation Method 2
a first diffusion layer, disposed on a top surface of the first substrate
Implementation Method 3
an adhesive layer disposed between a bottom surface of the third substrate and the first plurality of prisms to laminate the third substrate and the first plurality of prisms
Data Source
AI summary
A composite optical film comprises a first optical film and a second optical film disposed on the first optical film, wherein the first optical film comprises a first substrate; a plurality of reversed prisms disposed on a bottom surface of the first substrate; and a first diffusion film disposed over a top surface of the first substrate; and the second optical film comprises a first PET film thereon having a first set of prisms and a second PET film having a second set of prisms thereon, wherein the first PET film and the second PET film are laminated together.