Display Light Path Layer for Selective Viewing Angle Control
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Solution Overview
Problem
Display devices face challenges in providing both wide and narrow viewing angles, as they are often used in public spaces where privacy is a concern, necessitating a solution for selective viewing angle control.
Innovation Solution
A display device with a light path control layer having patterns of different refractive indices, positioned between encapsulation layers, which controls the light emission paths of first and second light emitting elements to selectively provide wide or narrow viewing angles by adjusting their emission modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display device uses a single viewing angle configuration, then it can provide either wide viewing angle or narrow viewing angle, but it cannot provide both wide and narrow viewing angles simultaneously
Solution Approach 1:
The display device is divided into multiple light emitting elements (first and second light emitting elements) with different light path control characteristics. The first light emitting element has a first light path control layer that allows light to escape in multiple directions, while the second light emitting element has a second light path control layer that restricts light to a specific direction, enabling different viewing angle modes through selective operation of these segmented elements
2Ease of operation
If the display device allows viewing from multiple angles, then viewing convenience is improved, but privacy protection is compromised
Solution Approach 1:
The display device dynamically switches between wide viewing angle mode and narrow viewing angle mode based on usage scenarios. In public spaces, the device operates in narrow viewing angle mode to prevent privacy leakage, while in private settings, it switches to wide viewing angle mode for enhanced viewing convenience, allowing adaptive response to different environmental contexts
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
Enables the display device to switch between wide and narrow viewing angles based on user position, enhancing privacy and usability in various settings.
Implementation Method 1
The light path control layer includes a first pattern overlapping the first light emitting element and having a first refractive index and a second pattern overlapping the second light emitting element and having a second refractive index that is greater than the first refractive index
Data Source
AI summary
A display device may include a substrate. A first light emitting element is disposed on the substrate. A second light emitting element is disposed on the substrate and is positioned adjacent to the first light emitting element. A first encapsulation layer is disposed on the first light emitting element and the second light emitting element. A light path control layer is disposed on the first encapsulation layer. The light path control layer includes a first pattern overlapping the first light emitting element and having a first refractive index and a second pattern overlapping the second light emitting element and having a second refractive index that is greater than the first refractive index.