Anti-Reflection Layer With Groove-Based Transmittance Zones
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Solution Overview
Problem
Portable display devices face reduced visibility due to external light reflection and scattering, and the integration of camera functions often reduces the display area, necessitating an effective anti-reflection solution.
Innovation Solution
A display device with an inorganic layer featuring grooves and an anti-reflection layer, where the anti-reflection layer has distinct regions with varying transmittance, including a first region overlapping the grooves and a second region outside, utilizing silicon oxynitride and polyvinyl alcohol, and undergoing a high-temperature, high-humidity treatment to enhance transparency and reduce reflectance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an anti-reflection layer is applied to reduce external light reflection, then visibility is improved, but the display area is reduced due to the need for optical members outside the display area
Solution Approach 1:
The anti-reflection layer is configured with different transmittance characteristics in different regions: a first region with higher transmittance overlapping the optical member and grooves, and a second region with lower transmittance in the display area. This local differentiation allows the anti-reflection function to be maintained where needed while preserving display area and quality where required.
Solution Approach 2:
The anti-reflection layer is segmented into multiple functional regions with different transmittance properties. The layer includes a first region overlapping the groove and optical member with higher transmittance, and a second region in the display area with lower transmittance, allowing each region to perform its specific function optimally.
2Object-generated harmful factors
If a uniform anti-reflection layer is used to reduce reflectance, then reflection is reduced, but transmittance in the display area is also reduced, degrading display quality
Solution Approach 1:
The anti-reflection layer exhibits local quality variations with different transmittance in different regions. The first region has higher transmittance to maintain display quality, while the second region has lower transmittance to provide anti-reflection functionality, resolving the contradiction between reducing reflection and maintaining transmittance.
3Adaptability or versatility
If optical members are disposed outside the display area to provide camera function, then camera function is achieved, but the display area is reduced
Solution Approach 1:
The anti-reflection layer is designed with a first region that overlaps the optical member positioned outside the display area, providing high transmittance for camera functionality. This allows the optical member to be disposed outside the display area without compromising display area or camera function.
4Illumination intensity
If the anti-reflection layer has high transmittance to improve visibility, then light transmission is improved, but reflectance reduction is compromised
Solution Approach 1:
The anti-reflection layer implements local quality differentiation where the second region in the display area has optimized transmittance for visibility, while the first region provides anti-reflection functionality. This resolves the contradiction by allowing different regions to optimize for their respective primary functions.
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 reflectance and improves display quality by creating a transparent anti-reflection layer within the display area, enhancing visibility and image clarity while maintaining a transmissive area for external light management.
Implementation Method 1
The silicon oxynitride (SiON) of the plurality of grooves of the inorganic layer undergoes a reaction which releases an NHz gas due to the aging treatment. The NHz gas causes a discoloration of a first region of the first optical layer that overlaps the plurality of grooves.
Implementation Method 2
An anti-reflection layer is disposed on the inorganic layer. The anti-reflection layer includes a first region that overlaps the groove and a second region that is outside of the first region. The transmittance of the first region and the transmittance of the second region are different from each other.
Implementation Method 3
The first optical layer may include polyvinyl alcohol. The first optical layer may include I5−, I3−, and I−
Data Source
AI summary
A display device includes a substrate, a circuit part disposed on the substrate and an encapsulation layer disposed on the circuit pan. An inorganic layer is disposed on the encapsulation layer and includes a groove. An anti-reflection layer is disposed on the inorganic layer. The anti-reflection layer includes a first region that overlaps the groove and a second region that is outside of the first region. The transmittance of the first region and the transmittance of the second region are different from each other.