Foldable Display Light Reflection Control via Reflector
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Solution Overview
Problem
Conventional display devices, particularly foldable and flexible ones, suffer from deteriorated display quality due to light reflection at specific viewing angles, especially when folded, leading to reduced visibility and recognition issues for users.
Innovation Solution
A display device design incorporating a first light emitting portion and a second light emitting portion positioned to surround a portion of the first light emitting portion, along with a reflector surrounding at least a portion of an opening, to manage light emission and minimize reflection at the folding axis, thereby maintaining excellent display quality across various viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional light emitting element is used, then the device structure is simple, but the display quality deteriorates due to light reflection at specific viewing angles
Solution Approach 1:
A reflector is introduced as an intermediary component between the light emitting element and the viewing environment. The reflector has a specific reflective pattern that redirects reflected light away from the folding axis, preventing display quality deterioration while maintaining the simplicity of the light emitting element structure.
Solution Approach 2:
The reflector is designed with non-uniform reflective properties at different locations. The reflective pattern varies across the reflector surface to specifically address light reflection issues at the folding axis while maintaining appropriate light emission characteristics in other viewing directions.
2Adaptability or versatility
If the display device is made foldable, then the adaptability increases, but the display quality deteriorates due to light reflection at the folding axis
Solution Approach 1:
The reflector serves as a mediator that specifically addresses the light reflection problem created by the foldable structure. By positioning the reflector and designing its reflective pattern appropriately, the system maintains foldable adaptability while eliminating the harmful reflection effect at the folding axis.
Solution Approach 2:
The design converts the harmful light reflection that occurs at the folding axis into a beneficial effect. The reflector is positioned and patterned to redirect the reflected light in a way that actually improves display quality in certain viewing angles while eliminating the reflection problem at the folding axis.
3Device complexity
If light emitting elements are used without directional control, then the device complexity is low, but the viewing angle characteristics deteriorate
Solution Approach 1:
The reflector acts as an intermediary that provides directional control to the light emitted by simple light emitting elements. Instead of complicating the light emitting element structure, the reflector is introduced to shape and direct the light output, achieving good viewing angle characteristics with minimal increase in device complexity.
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 enhances display quality by controlling light emission and reducing reflections, ensuring consistent and improved visibility for users regardless of the viewing angle, especially when the device is folded, thus addressing the limitations of conventional technologies.
Implementation Method 1
a first reflector in the first subpixel and surrounding at least a portion of the first opening, the first reflector including a portion of the first electrode on at least one of a first inclined surface of the first planarization layer that extends away from the substrate and a first inclined surface of the second planarization layer that extends away from the substrate
Data Source
AI summary
A display device is disclosed. Specifically, there may be provided a display device capable of achieving excellent display quality in a specific viewing angle direction by including a first light emitting portion and a second light emitting portion positioned to surround a portion of a perimeter of the first light emitting portion.