Liquid Crystal Panel Shock Absorbing Layer Design
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Solution Overview
Problem
Conventional liquid crystal panels face increased destruction frequency due to thinning of glass substrates, leading to impaired functionality from external shocks, as existing resin films lack sufficient shock absorption properties.
Innovation Solution
A liquid crystal panel design incorporating a front-side and rear-side polarizing plate with specific shock absorbing layers, where the front-side polarizing plate has a storage elastic modulus greater than 1 GPa and the rear-side polarizing plate has a lower storage elastic modulus, ensuring a specific relationship between the two, enhancing shock absorption capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If glass substrates are thinned to reduce weight, then weight is reduced, but shock resistance deteriorates
Solution Approach 1:
The patent applies composite materials by combining resin films with specific shock-absorbing layer structures to replace traditional glass substrates. The composite structure includes multiple layers with different elastic moduli designed to absorb and disperse shock energy, achieving both weight reduction and improved shock resistance simultaneously.
Solution Approach 2:
The patent changes material parameters by selecting resin films with specific storage elastic modulus values (E′f > 1 GPa at 25°C and 10^6 Hz for the front-side polarizing plate). By controlling the elastic modulus parameters and layer thicknesses, the patent optimizes shock absorption performance while maintaining lightweight properties.
2Adaptability or versatility
If resin films are used as glass substitute materials, then functionality is improved, but shock absorption properties are insufficient
Solution Approach 1:
The patent applies local quality by creating regions with different material properties within the resin film structure. The shock-absorbing layers are positioned at specific locations (front-side and rear-side polarizing plates) with optimized elastic modulus values to provide targeted shock absorption where needed most, while other regions maintain optical functionality.
Solution Approach 2:
The patent implements beforehand cushioning by pre-designing the resin film structure with shock-absorbing layers that have specific elastic modulus characteristics before shock occurs. The front-side polarizing plate is configured with E′f > 1 GPa to proactively absorb and disperse shock energy before it can damage internal display components.
3Reliability
If storage elastic modulus of front-side polarizing plate is increased above 1 GPa, then shock absorption is improved, but device complexity increases
Solution Approach 1:
The patent manages device complexity by focusing on changing key material parameters (storage elastic modulus > 1 GPa for front-side polarizing plate, and specific relationship between E′f and E′r) rather than adding complex structural elements. This parameter-based approach simplifies design while achieving improved shock absorption.
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 design effectively inhibits damage to internal display components by dispersing shock stress, maintaining display functionality even under external impacts, and exhibits improved shock absorption properties.
Implementation Method 1
a storage elastic modulus E′f of the shock absorbing layer of the front-side polarizing plate at 25° C. and a frequency of 106 Hz is more than 1 GPa
Implementation Method 2
shock absorption properties of a liquid crystal panel can be improved by setting a storage elastic modulus of a shock absorbing layer
Data Source
AI summary
A liquid crystal panel and an image display device include a front-side polarizing plate in which a resin film, a shock absorbing layer, and a hard coat layer are disposed in this order; and a rear-side polarizing plate in which a resin film and a shock absorbing layer are disposed in this order, in which a storage elastic modulus E′f of the shock absorbing layer of the front-side polarizing plate at 25° C. and a frequency of 106 Hz is more than 1 GPa, and a relationship between the E′f and a storage elastic modulus E′r of the shock absorbing layer of the rear-side polarizing plate at 25° C. and a frequency of 106 Hz satisfies the expression E′f−E′r>0.