Light-Emitting Device With Reflective Sidewalls for Light Extraction
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving high light extraction efficiency and luminance with low electric energy consumption, and there is a need for more convenient, useful, and reliable functional panels, display devices, input/output devices, and data processing devices.
Innovation Solution
The 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 efficiently extract and reflect light components, and includes a simplified manufacturing process for functional panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional light-emitting device structure is used, then the device can be manufactured with standard processes, but the light extraction efficiency is insufficient and energy consumption is high
Solution Approach 1:
The patent applies curvature by forming microlens structures on the light-emitting surface. These microlenses have curved surfaces that focus and extract light more efficiently than flat surfaces, directly addressing the low light extraction efficiency problem while reducing energy waste
Solution Approach 2:
The patent replaces conventional planar light extraction with optical focusing mechanisms using microlenses. This substitution of optical design principles into the light extraction mechanism significantly improves extraction efficiency and reduces energy loss
2Productivity
If microlens arrays are used to increase light extraction efficiency, then out-coupling efficiency improves three times, but the device structure becomes more complex
Solution Approach 1:
The patent merges the microlens array structure with the existing light-emitting device architecture. The microlenses are integrated directly onto the light-emitting surface, combining multiple functions (light extraction, focusing, and structural support) into a unified design that reduces overall complexity
Solution Approach 2:
The microlens structures serve multiple functions simultaneously: they act as light extraction enhancers, optical focusing elements, and structural components of the device. This multi-functionality reduces the need for separate components, thereby simplifying the overall device structure
3Productivity
If nanolens arrays are formed by vacuum evaporation to increase current efficiency, then efficiency increases by 1.57 times, but the manufacturing process becomes more complex
Solution Approach 1:
The patent replaces the vacuum evaporation process with a photolithography-based fabrication process. This substitution uses standard semiconductor manufacturing techniques that are more widely available and easier to control, reducing manufacturing complexity while maintaining the efficiency benefits of nanolens structures
4Productivity
If concave structures with high-index fillers are used to extract light, then light extraction efficiency improves, but the manufacturing process becomes more difficult
Solution Approach 1:
The patent extracts the light extraction function from complex concave structures with fillers and implements it through simpler surface-mounted microlens arrays. This extraction of the essential light extraction mechanism from its complex original context allows for easier manufacturing using standard photolithography techniques
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 enhances light extraction efficiency, achieves high luminance with low energy consumption, and simplifies the manufacturing process, resulting in a novel and reliable light-emitting device and functional panel.
Implementation Method 1
the sidewall reflects light components propagating along the layer containing a light-emitting material
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.