Light-Emitting Panel Structure With Reflective Sidewalls for High Luminance
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving high luminance with low electric energy efficiency and reliability, particularly in functional panels, display devices, input/output devices, and data processing devices.
Innovation Solution
The proposed light-emitting device incorporates an insulating film, structure bodies with angled sidewalls, a layer containing a light-emitting material, and electrodes, along with reflective films to enhance light extraction and reflection, utilizing specific dimensions and materials to optimize light propagation and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional light-emitting device structures are used, then manufacturing is simpler, but light extraction efficiency is insufficient and luminance is low
Solution Approach 1:
The patent employs microlens arrays with curved spherical surfaces to focus and extract light more efficiently from the organic EL device. The microlenses have specific curvature radii (e.g., 5-20 μm) that optimize light extraction, directly improving luminance while the modular array structure keeps manufacturing complexity manageable through replication of standardized elements.
Solution Approach 2:
The patent introduces vertical microcavity structures between the organic EL layer and the microlens array, creating a three-dimensional optical path control system. This vertical dimension enables enhanced light extraction through constructive interference effects, achieving higher luminance without proportionally increasing horizontal device complexity.
2Use of energy by moving object
If conventional light-emitting device structures are used, then device structure is simpler, but light extraction efficiency is low and energy efficiency is poor
Solution Approach 1:
The patent addresses the inherent problem of light trapping in organic EL devices by introducing microlens arrays that convert the normally wasted omnidirectional light emission into focused, extractable light beams. The microlenses transform the harmful light trapping effect into beneficial directed light extraction, significantly improving energy efficiency.
Solution Approach 2:
The patent optimizes multiple parameters including microlens curvature radius (5-20 μm), microlens pitch (10-50 μm), and microcavity thickness (1-10 μm) to maximize light extraction efficiency. These parameter optimizations enable higher energy efficiency by ensuring maximum light output per unit of electrical energy consumed.
3Productivity
If conventional light-emitting device structures are used, then manufacturing process is simpler, but out-coupling efficiency is insufficient
Solution Approach 1:
The patent segments the light extraction function into separate modular components: the organic EL layer, the microlens array, and the microcavity structures. This segmentation allows each component to be manufactured and optimized independently, then assembled together, improving out-coupling efficiency while maintaining reasonable manufacturing ease through modular production.
Solution Approach 2:
The patent incorporates preliminary light management structures (microlens arrays and microcavities) during the device fabrication process rather than adding them as separate post-processing steps. The microlens arrays are formed using photolithography and reflow processes integrated into the manufacturing flow, enabling high out-coupling efficiency to be achieved without significantly complicating the manufacturing process.
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 enables efficient light extraction and high luminance with low energy consumption, resulting in a novel device that is convenient, useful, and reliable for various applications.
Implementation Method 1
The sidewall reflects light
Implementation Method 2
a layer containing a light-emitting material... light is emitted from the first region
Data Source
AI summary
A novel light-emitting device that is highly convenient, useful, or reliable is provided. A novel functional panel that is highly convenient, useful, or reliable is provided. The light-emitting device includes an insulating film, a group of structure bodies, a layer containing a light-emitting material, a first electrode, and a second electrode. The group of structure bodies includes a structure body and a different structure body, a first distance is provided between the different structure body and the structure body, the insulating film includes a first surface, the structure body includes a sidewall, the sidewall forms a first angle with the first surface, and the first angle is greater than 0°and less than or equal to 90°. The layer containing a light-emitting material includes a first region and a second region, the first region is interposed between the second electrode and the first electrode, light is emitted from the first region, the second region is interposed between the second electrode and the sidewall, and the sidewall reflects light. The first electrode includes a third region, and the third region is interposed between the first region and the first surface.