Optical Laminate Reddening-Resistant Layer Thermal Management
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Solution Overview
Problem
Display devices, particularly those used in navigation and vehicle dashboards, face challenges due to the reddening of optical laminates and polarizing layers when exposed to high temperatures, leading to reduced durability and performance.
Innovation Solution
The implementation of a reddening-resistant layer in optical laminates, which includes a void-containing layer or a laminate with a void-containing layer adjacent to the optical functional layer, effectively blocks heat transfer and delays the reddening process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the optical laminate is used in contact with the cover glass under high temperature conditions, then the thermal conduction is improved, but the reddening of the optical laminate occurs leading to reduced durability
Solution Approach 1:
A reddening-resistant layer is introduced as an intermediary between the optical functional layer and the cover glass. This layer has higher thermal conductivity than conventional optical laminates, enabling efficient heat dissipation while protecting the optical functional layer from thermal damage and reddening, thus maintaining durability under high temperature conditions
Solution Approach 2:
The reddening-resistant layer is constructed as a composite material consisting of a polymer matrix combined with heat-conductive particles (such as metal oxides or ceramic particles). This composite structure provides both the necessary thermal conduction for heat dissipation and the protective function against reddening, resolving the contradiction between thermal management and durability
2Loss of energy
If the optical laminate is exposed to high temperature, then the heat transfer is enhanced, but the change in a* value and transmittance increases
Solution Approach 1:
The reddening-resistant layer acts as a thermal mediator that facilitates controlled heat transfer away from the optical functional layer. By positioning this layer adjacent to the optical functional layer, heat is efficiently conducted through the reddening-resistant layer to the cover glass, preventing excessive temperature rise that would cause changes in a* value and transmittance
Solution Approach 2:
The reddening-resistant layer is designed with specific thermal conductivity parameters higher than conventional optical laminates. By adjusting the concentration and type of heat-conductive particles in the polymer matrix, the thermal conductivity parameter is optimized to enhance heat transfer while maintaining optical property stability under elevated temperatures
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 reddening-resistant layer significantly reduces the change in a* value and transmittance of the optical laminate even under harsh conditions, maintaining the optical properties and durability of the display devices.
Implementation Method 1
the reddening-resistant layer significantly reduces the change in a* value and transmittance of the optical laminate even under harsh conditions
Data Source
AI summary
An optical laminate or a reddening-resistant layer. The optical laminate does not cause a reddening phenomenon even when driven or maintained under extremely harsh conditions (e.g., very high temperature conditions), or a reddening-resistant layer applied thereto.