Reflective Panel Cushioning Layer to Reduce Display Mura
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Solution Overview
Problem
Existing electronic devices with reflective panels face issues in quality and reliability, particularly in managing impact forces that cause uneven brightness or 'mura' due to changes in liquid crystal layer thickness and alignment.
Innovation Solution
Incorporating a material layer with a lower Young's modulus than the light-shielding element and protective substrate, which disperses reacting forces to reduce the impact on the reflective panel, thereby minimizing mura and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid protective substrate and light-shielding element are used, then structural strength is improved, but impact forces concentrate on the reflective panel causing mura
Solution Approach 1:
A cushioning layer with lower Young's modulus than both the protective substrate and light-shielding element is introduced as an intermediary component between them and the reflective panel. This cushioning layer absorbs and disperses impact forces, preventing direct transmission to the liquid crystal layer and thus avoiding mura while maintaining overall structural strength.
Solution Approach 2:
The Young's modulus of the cushioning layer is specifically designed to be lower than that of the protective substrate and light-shielding element. This parameter change creates a gradient structure that progressively absorbs impact energy, with the softest layer closest to the reflective panel, thereby protecting display quality while maintaining structural integrity.
2Ease of manufacture
If the protective substrate is directly affixed to the frame, then assembly simplicity is improved, but impact forces are directly transmitted to the reflective panel
Solution Approach 1:
The cushioning layer serves as a mediator between the protective substrate assembly and the frame. It is disposed between these components to intercept and dissipate impact forces before they reach the reflective panel, while still allowing for relatively simple assembly procedures.
Solution Approach 2:
The cushioning layer is pre-positioned between the protective substrate/light-shielding element assembly and the frame before final assembly. This beforehand cushioning ensures that impact forces are absorbed before they can transmit to the reflective panel, preventing mura from the outset.
3Ease of manufacture
If uniform rigid materials are used throughout the device, then manufacturing consistency is improved, but impact forces cannot be effectively dispersed
Solution Approach 1:
The cushioning layer with lower Young's modulus is specifically positioned at the location where impact protection is most critical - between the protective substrate/light-shielding element assembly and the reflective panel. This local quality change provides targeted impact dispersion where needed most, while other parts of the device can maintain manufacturing consistency.
Solution Approach 2:
The device employs a composite structure combining materials with different Young's moduli - the rigid protective substrate and light-shielding element paired with a softer cushioning layer. This composite approach enables both manufacturing consistency in the main structural components and effective impact force dispersion through the softer intermediate material.
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 reduces the occurrence of mura and improves the reliability of electronic devices by dispersing impact forces, maintaining display quality and reducing thickness constraints.
Implementation Method 1
The Young's modulus of the material layer is less than the Young's modulus of the light-shielding element
Data Source
AI summary
An electronic device is provided. The electronic device includes a reflective panel; a light-shielding element disposed on a side of the reflective panel away from a viewing side of the electronic device; and a material layer disposed on the side of the reflective panel away from the viewing side of the electronic device. The Young's modulus of the material layer is less than the Young's modulus of the light-shielding element.