Variable Thickness Reflection Member for Display Mirror Function
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Solution Overview
Problem
Conventional portable thin flat panel display devices face challenges in achieving a mirror function while maintaining display quality, as semi-transparent mirrors reduce transmission and reflection efficiency and cause blurring due to diffuse reflection from electrodes and metal layers.
Innovation Solution
A display device design featuring a reflection member with varying thicknesses in light-emitting and non-light-emitting regions, where the reflection member in the non-light-emitting region has a higher thickness and reflectance, and in the light-emitting region has a lower thickness and reflectance, minimizing diffuse reflection and enhancing specular reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a semi-transparent mirror is used to achieve mirror function, then reflection capability is improved, but transmission efficiency is reduced and blurring occurs due to diffuse reflection
Solution Approach 1:
The reflection member is designed with different thicknesses in different regions: a first thickness in the light-emitting region and a second thickness in the non-light-emitting region. This local variation in thickness creates different reflectance values, allowing the light-emitting region to maintain high transmission efficiency while the non-light-emitting region provides strong reflection capability for mirror function.
Solution Approach 2:
The reflection member is segmented into two distinct regions with different optical properties: a light-emitting region with lower reflectance and a non-light-emitting region with higher reflectance. This segmentation allows each region to be optimized for its specific function, resolving the contradiction between transmission efficiency and reflection capability.
2Illumination intensity
If a semi-transparent mirror is used to achieve mirror function, then reflection capability is improved, but blurring occurs due to diffuse reflection from electrodes and metal layers
Solution Approach 1:
By making the reflection member thinner in the light-emitting region, the patent reduces the amount of material that causes diffuse reflection, thereby improving reflection quality and reducing blurring in the display region while maintaining adequate reflection capability where needed.
3Ease of manufacture
If uniform thickness reflection member is used, then manufacturing is simplified, but mirror function efficiency is reduced due to excessive diffuse reflection in light-emitting region
Solution Approach 1:
The reflection member employs non-uniform thickness with a first thickness in the light-emitting region and a second thickness in the non-light-emitting region. This design optimizes mirror function efficiency by reducing diffuse reflection in the light-emitting region while maintaining adequate reflection in the non-light-emitting region, accepting increased manufacturing complexity as a trade-off for improved performance.
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
This design improves mirror function efficiency by minimizing blurring and maintaining display quality, as the varying reflectance and thickness of the reflection member optimize specular reflection and reduce diffuse reflection, thereby enhancing both mirror and display performance.
Implementation Method 1
the reflection member in the non-light-emitting region has a higher thickness and reflectance, and in the light-emitting region has a lower thickness and reflectance, minimizing diffuse reflection and enhancing specular reflection
Data Source
AI summary
A display device and a method of manufacturing the same. The display device includes: a substrate; and a reflection member that is disposed on a surface of the substrate and has a first thickness in a first reflection region corresponding to a light-emitting region and a second thickness in a second reflection region corresponding to a non-light-emitting region.