Display Device Refractive Patterns Viewing Angle
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Solution Overview
Problem
Display devices experience a decrease in luminance when viewed from various angles due to light emission in multiple directions, necessitating improvements in viewing angle adjustment.
Innovation Solution
The display device incorporates a first and second light emitting layer with specific dimensions, refractive patterns having different refractive indices, and black matrices to adjust the viewing angle by refracting light and blocking emissions, thereby enhancing luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light emitting layers emit light in various directions to enable viewing from multiple angles, then viewing angle is improved, but luminance decreases
Solution Approach 1:
The patent applies local quality by creating refractive patterns with different refractive indices in specific regions above the light emitting layers. These localized refractive structures selectively redirect light rays in different directions, allowing viewing from multiple angles while concentrating luminance in desired viewing zones. The refractive patterns are positioned only where needed to control light distribution without affecting the entire display uniformly.
Solution Approach 2:
The patent introduces refractive patterns as intermediary elements between the light emitting layers and the viewer. These refractive patterns act as optical mediators that redirect and control light paths, enabling the light to reach different viewing angles while maintaining luminance intensity. The black matrices also serve as intermediaries by selectively blocking light in unwanted directions.
2Illumination intensity
If refractive patterns with different refractive indices are introduced to control light direction, then luminance is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the refractive patterns by integrating light redirection, viewing angle control, and luminance enhancement into a single structural element. The refractive patterns are formed as integral parts of the display structure, combining optical control functions that would otherwise require separate components. This merging reduces overall device complexity while achieving multiple optical objectives.
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 narrows the viewing angle and improves luminance by refracting light more efficiently and blocking unwanted emissions, resulting in improved light emission characteristics.
Implementation Method 1
a plurality of refractive patterns having a first refractive index, a first refractive layer on the refractive patterns and including a second refractive index lower than the first refractive index
Data Source
AI summary
A display device includes a first light emitting layer having a first length in a first direction and emitting a first light, a second light emitting layer having a second length in the first direction and emitting a second light different from the first light, a first refractive layer on the first light emitting layer and the second light emitting layer and including a plurality of refractive patterns having a first refractive index, a second refractive layer which covers the first refractive layer and has a second refractive index lower than the first refractive index, and a plurality of first black matrices on the second refractive layer and adjacent to the first light emitting layer and the second light emitting layer in a second direction crossing the first direction.