Arc-Protrusion Polarizer Sheet for Impact Pressure Dispersion
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Solution Overview
Problem
Polarizer protective sheets in LCD devices are prone to damage when an impact force is applied, and existing solutions do not effectively disperse pressure to the prism sheet, leading to potential damage and hindering the reduction in device thickness.
Innovation Solution
A polarizer protective sheet with a base material layer and a light diffusing layer featuring arc-shaped protrusions on its surface, where the average radius is between 10 μm and 100 μm, and the average height is 10 μm or less, which disperses pressure and reduces the risk of damage to the prism sheet while allowing for thinner LCD devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a polarizer protective sheet with a randomly shaped surface is used, then the device thickness can be reduced, but the pressure to the prism sheet is not sufficiently dispersed causing damage when impact force is applied
Solution Approach 1:
The invention applies spherical protrusions with a specific radius (10-100 μm) on the surface of the polarizer protective sheet. These curved spherical structures effectively disperse impact pressure across a larger area compared to flat or randomly shaped surfaces, preventing concentration of force on the prism sheet while maintaining thin device profile.
Solution Approach 2:
The invention changes the surface geometry parameters by introducing protrusions with controlled radius (10-100 μm) and height (5-20 μm). This parameter optimization allows the protective sheet to maintain structural integrity and pressure dispersal capability while achieving reduced overall device thickness.
2Device complexity
If the polarizer protective sheet has a flat surface, then the structure is simple, but pressure is not dispersed effectively causing damage to the prism sheet under impact
Solution Approach 1:
The invention introduces spherical protrusions on the protective sheet surface, transforming the flat geometry into a curved surface structure. This curvature enables effective pressure dispersion during impact while keeping the structural complexity manageable through standardized spherical features.
Solution Approach 2:
The invention applies local surface modification by adding protrusions only on the impact-facing surface of the protective sheet. This localized quality change provides pressure dispersal functionality where needed without complicating the overall structure or other functional layers of the protective sheet.
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 effectively disperses pressure applied to the prism sheet during impact, preventing damage and enabling a reduction in the thickness of LCD devices without compromising the light diffusing function, thus enhancing the durability and design of the devices.
Implementation Method 1
a light diffusing layer formed on a surface of the base material layer. A plurality of protrusions are formed on an opposite surface of the light diffusing layer from the base material layer, and the protrusions have a substantially arc-shaped section
Data Source
AI summary
A polarizer protective sheet includes a base material layer and a light diffusing layer formed on a surface of the base material layer. A plurality of protrusions are formed on an opposite surface of the light diffusing layer from the base material layer, and the protrusions have a substantially arc-shaped section. The average radius of the protrusions is 10 μm or more and 100 μm or less, and the average height of the protrusions is 10 μm or less.