Display Device Light Blocking Layer Recessed Holes
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Solution Overview
Problem
Display devices face challenges in minimizing external light reflection and improving light output efficiency, particularly due to the reflection of light by electrodes and the lack of effective light management structures.
Innovation Solution
The display device incorporates a light blocking layer with recessed portions and holes exposing electrodes, along with light emitting elements, a second electrode, and a light conversion pattern, and includes reflective members to direct light emission and enhance light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light blocking layer is introduced to minimize external light reflection, then reflection is reduced, but device complexity increases
Solution Approach 1:
The light blocking layer is integrated within the existing display device structure, nested between the substrate and the encapsulation layer. This nesting approach allows the light blocking function to be added without significantly increasing overall device complexity, as the new layer fits within the existing architectural framework rather than adding external components.
Solution Approach 2:
The light blocking layer serves multiple functions simultaneously: it blocks external light reflection, provides structural support, and can be integrated with other device layers to achieve both optical and mechanical benefits. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity.
2Productivity
If light management structures are added to improve light output efficiency, then light output efficiency is improved, but device complexity increases
Solution Approach 1:
The light management structures, including the light blocking layer with specific patterns and the encapsulation layer with optimized optical properties, are applied locally where needed rather than uniformly across the entire device. This localized approach improves light output efficiency at critical interfaces without requiring complex modifications throughout the entire device structure.
Solution Approach 2:
The patent introduces light management functionality by adding layers in the vertical dimension (z-axis) rather than complicating the horizontal planar structures. The light blocking layer and encapsulation layer provide optical management through their vertical positioning and thickness control, allowing efficiency improvement without significant lateral 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
This configuration minimizes external light reflection and improves light output efficiency by effectively directing light emission and reducing interference between pixels, resulting in enhanced display quality.
Implementation Method 1
the light conversion pattern may include a color conversion layer that converts light of a first color emitted from the light emitting elements into light of a second color
Implementation Method 2
a light blocking layer disposed on the substrate, the light blocking layer including a recessed portion recessed toward the first electrode
Implementation Method 3
the display device may further include a first reflective member surrounding an outer circumferential surface between the first end and the second end of each of the light emitting elements
Data Source
AI summary
A display device includes a first electrode disposed on a substrate. A light blocking layer is disposed on the substrate, the light blocking layer includes a recessed portion recessed toward the first electrode. Holes exposing the first electrode are formed in the recessed portion of the light blocking layer. Light emitting elements are disposed in the holes, each of the light emitting elements including a first end electrically contacting the first electrode. A second electrode is disposed on the light blocking layer, the second electrode electrically contacts a second end of each of the light emitting elements. A light conversion pattern is disposed in the recessed portion of the light blocking layer.