Inorganic Pattern Layer Anti-Reflection in Display Devices
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Solution Overview
Problem
Display devices suffer from degraded image quality due to external light reflection, and existing solutions like polarizing plates compromise brightness.
Innovation Solution
A display device with an inorganic pattern layer acting as an anti-reflective member, featuring a pattern layer with protrusions between the capping and encapsulation layers to enhance adhesion and reduce reflection, while maintaining image brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizing plate is used to reduce external light reflection, then reflectance is reduced, but brightness of images deteriorates
Solution Approach 1:
The anti-reflective function is segmented into multiple inorganic layers with different refractive indices (first inorganic layer, second inorganic layer) arranged in sequence, creating a gradient structure that reduces reflection without blocking light like a single polarizing plate would
Solution Approach 2:
The anti-reflective structure uses composite inorganic materials with different optical properties (different refractive indices) stacked together to achieve both anti-reflection and light transmission, avoiding the brightness loss associated with polarizing plates
2Object-affected harmful factors
If an inorganic pattern layer is used as anti-reflective member, then external light reflection is reduced, but adhesion between layers deteriorates
Solution Approach 1:
The inorganic pattern layer features localized protrusions with specific geometric shapes and dimensions that create enhanced adhesion points between layers, while maintaining the anti-reflective optical properties in the surrounding areas
Solution Approach 2:
The protrusions in the inorganic pattern layer have curved or rounded surfaces rather than sharp edges, which improve mechanical interlocking and adhesion between the pattern layer and adjacent layers while maintaining optical functionality
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 improves adhesion between layers, enhancing the reliability of the display device and reducing external light reflection without compromising brightness.
Implementation Method 1
When external light is incident into the display device, the external light may be reflected by electrodes in the display panel... a display device including an inorganic pattern layer as an anti-reflective member... reducing external light reflection
Data Source
AI summary
A display device includes: a display panel comprising light emitting areas and a non-light-emitting area adjacent to the light emitting areas; an input sensor on the display panel; and a reflective control layer on the input sensor, the display panel including: a light emitting element; a capping layer on the light emitting element; a pattern layer directly on the capping layer and comprising a plurality of protrusions spaced apart from each other; and an encapsulation layer on the pattern layer, wherein each of the protrusions does not overlap the light emitting areas and overlaps the non-light-emitting area.