Light Diffusion Film Elliptical Pattern via Flaky Objects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light diffusion films with louver or columnar structures face difficulties in diffusing light into an elliptical shape, making them unsuitable for widely used rectangular displays, especially when viewing angles vary.
Innovation Solution
A light diffusion film with a structure composed of flaky-shaped objects of high refractive index arranged in multiple rows within regions of low refractive index, where the width and length of these objects are adjusted to achieve an elliptical diffusion pattern, allowing for effective diffusion of incident light into an elliptical shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a louver structure with plate-shaped regions is used, then light diffusion in the direction perpendicular to the louver structure is improved, but light diffusion in the direction parallel to the louver structure is insufficient
Solution Approach 1:
The invention divides the light diffusion function into two independent directional components by using two sets of flaky-shaped objects oriented perpendicular to each other. The first set of flaky-shaped objects handles light diffusion in one direction, while the second set handles light diffusion in the perpendicular direction, achieving uniform diffusion in both directions through segmentation of the diffusion function.
Solution Approach 2:
The invention employs asymmetric arrangement of flaky-shaped objects in multiple rows with different orientations. The flaky-shaped objects are arranged at specific angles (e.g., 0° and 45°) relative to the film plane, creating an asymmetric structure that enables elliptical light diffusion patterns. This asymmetric arrangement allows the film to achieve uniform light diffusion across different viewing angles while maintaining the desired elliptical shape.
2Illumination intensity
If a columnar structure with pillars is used, then uniform light diffusion is achieved, but the diffused light forms a circular shape unsuitable for rectangular displays
Solution Approach 1:
The invention employs asymmetric arrangement of flaky-shaped objects in multiple rows with different orientations. The flaky-shaped objects are arranged at specific angles (e.g., 0° and 45°) relative to the film plane, creating an asymmetric structure that enables elliptical light diffusion patterns. This asymmetric arrangement allows the film to achieve uniform light diffusion across different viewing angles while maintaining the desired elliptical shape.
Solution Approach 2:
The invention transitions from a single-dimension columnar structure to a multi-dimensional arrangement of flaky-shaped objects. By arranging flaky-shaped objects in multiple rows with different orientations and angles in three-dimensional space, the invention achieves elliptical light diffusion patterns that are suitable for rectangular displays, effectively adding dimensional complexity to control light distribution shape.
3Shape
If flaky-shaped objects are arranged in multiple rows, then elliptical light diffusion is achieved, but the structure becomes more complex
Solution Approach 1:
The invention controls the parameters of flaky-shaped objects including their size, shape, refractive index, and arrangement geometry to achieve the desired elliptical light diffusion. By adjusting parameters such as the aspect ratio of flaky-shaped objects, their spacing, orientation angles, and refractive index contrast with the surrounding medium, the invention achieves elliptical diffusion patterns without requiring overly complex structural variations.
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 film effectively diffuses incident light into an elliptical shape, enhancing its applicability to rectangular displays by controlling the incident angle dependency and the angle of aperture, thereby improving light distribution uniformity.
Implementation Method 1
a light diffusion film which contains, inside the film, a structure composed of a plurality of flaky-shaped objects with comparatively high refractive index arranged in multiple rows in a region with comparatively low refractive index
Implementation Method 2
The film effectively diffuses incident light into an elliptical shape, enhancing its applicability to rectangular displays
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
There is provided a light diffusion film capable of diffusing incident light into an elliptical shape with respect to a plane parallel to the light diffusion film, and which has excellent applicability to rectangular displays. According to the present invention, there is provided a light diffusion film for diffusing incident light into an elliptical shape, which contains, inside the film, a structure composed of a plurality of flaky-shaped objects with comparatively high refractive index arranged in multiple rows in a region with comparatively low refractive index along any one arbitrary direction along the film plane. If T50 (µm) is the width of the flaky-shaped objects at a position of 50 µm below the upper end of the flaky-shaped objects in the direction of the thickness of the light diffusion film, and if L50 (µm) is the length of the flaky-shaped objects in the above-mentioned arbitrary one direction, the following relation (1) is satisfied: