Optical Film Protrusions for Precise Light Angle Control
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Solution Overview
Problem
Current viewing angle improvement films for displays are limited in their ability to finely control light angles, particularly in small ranges, leading to suboptimal viewing angle performance as panel size and resolution increase.
Innovation Solution
An optical film with a substrate and protrusions featuring specific inclined surfaces and planes that adjust light in different viewing angle ranges, allowing for precise control of light emission, including a planarization layer with a higher refractive index than the substrate and protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If simple and regular microstructures are used in viewing angle improvement films, then manufacturing is easier and device complexity is reduced, but the ability to finely control light angles in small ranges is insufficient
Solution Approach 1:
The protrusion is divided into multiple functional surfaces: a first inclined surface for coarse angle adjustment and a second inclined surface for fine angle adjustment. This segmentation allows each surface to control different aspects of light direction, achieving precise light angle control while maintaining a relatively simple overall structure that can be manufactured using conventional techniques.
Solution Approach 2:
Different surfaces of the protrusion are designed with different local properties: the first inclined surface has a specific slope for broad angle control, while the second inclined surface has a different slope for fine-tuned angle control. This local differentiation enables precise control of light angles in small ranges without requiring the entire structure to be complex.
2Area of stationary object
If panel size and resolution are increased, then display quality and viewing area are improved, but large viewing angle performance deteriorates
Solution Approach 1:
The invention addresses viewing angle performance by introducing a new dimensional approach through the dual-inclined surface structure. The first and second inclined surfaces operate in different angular dimensions, with the first handling broader angle ranges and the second handling finer angle adjustments. This multi-dimensional light control approach maintains excellent viewing angle performance even as panel size and resolution increase.
3Adaptability or versatility
If external optical solutions are added to improve viewing angle performance, then large viewing angle performance is improved, but device structure becomes more complex
Solution Approach 1:
The invention merges the functions of multiple optical films into a single integrated protrusion structure. The first inclined surface and second inclined surface are combined in one protrusion, eliminating the need for separate optical films stacked together. This integration maintains excellent viewing angle performance while reducing overall device structure complexity and simplifying manufacturing processes.
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 optical film optimizes viewing angle performance by finely adjusting light angles, enhancing light intensity and extraction rates across various viewing angles, improving display quality and uniformity.
Implementation Method 1
a first inclined surface connected to the center plane, wherein the first inclined surface extends away from the surface of the substrate in a direction away from the center plane; and a second inclined surface connected between the first inclined surface and the surface of the substrate
Implementation Method 2
A refractive index of the planarization layer is greater than a refractive index of the substrate and a refractive index of the protrusion, and the refractive index of the protrusion is greater than or equal to the refractive index of the substrate
Data Source
AI summary
An optical film and a display device are provided. The optical film includes a substrate and a plurality of protrusions disposed on a surface of the substrate. The protrusion includes a center plane, a first inclined surface, and a second inclined surface. The first inclined surface is connected to the center plane. The first inclined surface extends away from the surface of the substrate in a direction away from the center plane. The second inclined surface is connected between the first inclined surface and the surface of the substrate. The second inclined surface approaches the surface of the substrate in the direction away from the center plane.