Light Diffusion Film for Polarizer Viewing Angle
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Solution Overview
Problem
Conventional optical films used to enlarge chromaticity viewing angle of display devices require additional film layers, leading to increased thickness and decreased outgoing light, which deteriorates display contrast.
Innovation Solution
A light diffusion film with light diffusion particles dispersed in a substrate, where the mass fraction of these particles is less than 3%, effectively refracting light to enhance viewing angle without the need for additional film layers, thereby improving contrast and outgoing light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an additional film layer is added to the polarizer to enlarge chromaticity viewing angle, then the chromaticity viewing angle is improved, but the thickness of the polarizer increases and outgoing light decreases
Solution Approach 1:
The patent merges the light diffusion function directly into the polarizer by incorporating light diffusion particles into the polarizer's film layer, eliminating the need for a separate additional film layer. This integration maintains the polarizer's original thickness while achieving both polarization and light diffusion effects, thereby resolving the contradiction between improving chromaticity viewing angle and increasing thickness.
Solution Approach 2:
The polarizer is designed to perform multiple functions simultaneously: it provides polarization functionality while also incorporating light diffusion capability through dispersed particles. This multi-functional design allows the single film layer to achieve both chromaticity viewing angle enhancement and maintain original thickness, resolving the technical contradiction.
2Adaptability or versatility
If an additional film layer is added to the polarizer to enlarge chromaticity viewing angle, then the chromaticity viewing angle is improved, but the outgoing light from the display device decreases
Solution Approach 1:
The patent combines the light diffusion function within the polarizer's existing structure by dispersing light diffusion particles throughout the film layer. This integration eliminates the need for an additional film layer that would block outgoing light, thereby maintaining high light output while achieving improved chromaticity viewing angle.
Solution Approach 2:
The patent introduces light diffusion particles with specific properties (refractive index difference, particle size distribution) into the polarizer to create localized light diffusion effects. These particles are strategically designed to diffuse light in a controlled manner to enhance viewing angle while minimizing light loss, thus resolving the contradiction between improving viewing angle and maintaining outgoing light intensity.
3Adaptability or versatility
If an additional film layer is added to the polarizer to enlarge chromaticity viewing angle, then the chromaticity viewing angle is improved, but the process becomes more complicated
Solution Approach 1:
The patent integrates the light diffusion function directly into the polarizer manufacturing process by incorporating light diffusion particles during the film formation stage. This merging of functions into a single film layer eliminates the need for additional lamination or assembly steps, thereby simplifying the overall manufacturing process while achieving improved chromaticity viewing angle.
Solution Approach 2:
The polarizer is designed as a multi-functional component that simultaneously provides polarization and light diffusion capabilities. This universal design approach eliminates the need for separate processing of additional film layers, reducing process complexity while achieving the desired chromaticity viewing angle enhancement.
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 increases the viewing angle and contrast of display devices by refracting light without adding extra film layers, thus enhancing light output and display quality.
Implementation Method 1
light diffusion particles dispersed in the substrate... effectively refracting light to enhance viewing angle
Data Source
AI summary
An embodiment of the present application discloses a light diffusion film including a substrate and light diffusion particles dispersed in the substrate, wherein a mass fraction of the light diffusion particles in the substrate is less than 3%. According to the present application, by adding the light diffusion particles having a mass fraction less than 3% to the substrate of the light diffusion film, the viewing angle of the polarizer can be improved.