Light Diffusion Film Particle Design for Contrast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display panels with large viewing angles experience a decrease in contrast due to the attachment of conventional light diffusion films, which affects display quality.
Innovation Solution
A light diffusion film comprising a resin layer with first particles having a constant diameter and second particles with progressively decreasing diameters, which are strategically mixed to enhance scattering effects while minimizing contrast reduction, is used in conjunction with a polarizer and liquid crystal display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional light diffusion film is attached to the liquid crystal display screen to expand the chromaticity viewing angle, then the viewing angle is improved, but the contrast of the display panel is reduced
Solution Approach 1:
The patent uses a composite light diffusion film containing both first particles (cylindrical shape) and second particles (conical shape) with specific size ratios. This composite structure enables the film to achieve wide viewing angle while maintaining contrast performance, resolving the contradiction between viewing angle expansion and contrast preservation
Solution Approach 2:
The patent employs particles with different shapes and light scattering characteristics in specific proportions. The cylindrical first particles provide uniform scattering for viewing angle expansion, while the conical second particles provide directional scattering to maintain contrast. This local differentiation of particle properties allows simultaneous optimization of both parameters
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 improves the chromaticity viewing angles and maintains better contrast for liquid crystal display panels, achieving a balance between light diffusion and minimal impact on contrast, thereby enhancing display quality.
Implementation Method 1
a light diffusion film including a resin layer, a plurality of first particles and a plurality of second particles disposed in the resin layer
Data Source
AI summary
The present disclosure discloses a light diffusion film, a polarizer including the light diffusion film, and a liquid crystal display device. A plurality of first particles and a plurality of second particles disposed in the resin layer of the light diffusion film. Each of the first particles has a diameter remaining unchanged in a longitudinal direction of the first particles. Each of the second particles includes a first end portion and a second end portion in a longitudinal direction thereof, and a diameter of the first end portion decreases progressively in a direction away from the second end portion.