Display Device Barrier Layer for Large Area Uniformity
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Solution Overview
Problem
Current display devices face challenges in scaling up size while maintaining image quality and suppressing display unevenness, particularly when displaying on curved surfaces.
Innovation Solution
A display device comprising multiple display panels with a barrier layer made of inorganic insulating material, a substrate, and adhesive layers with specific refractive indices, allowing for seamless overlap and efficient light transmission, which enhances mechanical strength and reduces display unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If display device size is increased, then information display capability is improved, but display unevenness increases
Solution Approach 1:
The display device is divided into multiple display panels (first display panel, second display panel, etc.) that are arranged in a matrix and connected via adhesive layers. This segmentation allows each panel to be manufactured and controlled separately, maintaining manufacturing precision while achieving large overall display area.
Solution Approach 2:
Barrier layers are selectively provided in specific regions (first region, second region, third region) with different configurations. The barrier layers have controlled thickness (10 nm to 2 μm) and are positioned to address local display unevenness issues in different areas of the large display, ensuring uniform quality across the entire large display area.
2Area of stationary object
If display device size is increased, then information display capability is improved, but mechanical strength deteriorates
Solution Approach 1:
The display device employs a composite structure combining multiple display panels, adhesive layers, and barrier layers. The adhesive layers provide mechanical bonding between panels while the barrier layers contribute structural support, creating a composite system that maintains mechanical strength across large display areas.
Solution Approach 2:
The barrier layers are nested within the display panel structure, with the first barrier layer positioned between the first and second display panels, and a second barrier layer positioned between the second display panel and the third display panel. This nested arrangement provides structural reinforcement without adding significant overall thickness.
3Adaptability or versatility
If display device is made curved, then adaptability to different surfaces is improved, but manufacturing complexity increases
Solution Approach 1:
The display device structure is designed to accommodate both flat and curved configurations. The multiple display panels connected by adhesive layers can be arranged in various geometries, including curved surfaces, without requiring fundamental changes to the basic panel-barrier-adhesive structure, thus maintaining manufacturing simplicity while achieving versatility.
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 enables larger display devices with improved image quality and reduced display unevenness, capable of displaying on curved surfaces by optimizing the refractive indices and materials used in the display panels.
Implementation Method 1
the substrate includes a portion having a first refractive index, the first adhesive layer includes a portion having a second refractive index, the barrier layer of the second display panel includes a portion having a third refractive index, and the lowest refractive index among the first refractive index to the third refractive index is preferably 80% or more of the highest refractive index
Data Source
AI summary
A display device suitable for increasing in size, a display device where display unevenness is suppressed, or a display device that can display an image on a curved surface is provided. The display device includes a first display panel, a second display panel, a first adhesive layer, and a substrate. The first and second display panels each include a first region, a second region, and a barrier layer. The barrier layer includes a portion overlapping with the first region and a portion overlapping with the second region. The first region includes a region transmitting visible light. The second region can display an image. The barrier layer contains an inorganic insulating material and includes a region in contact with the first adhesive layer and a region with a thickness of 10 nm to 2 μm. The display device includes a region where the substrate, the first adhesive layer, the first region of the second display panel, and the second region of the first display panel overlap each other.